EAGLE Netlist conversion

On Mar 4, 8:35 am, Stuart Brorson <s...@cloud9.net> wrote:
In article <13olp0qlmgrs...@corp.supernews.com> you wrote:
: Stuart Brorson wrote:

:> Hello!
:
:> This is to announce the release of gerbv-2.0.0! Gerbv is an open source
:> Gerber file (RS-274X only) viewer .....
:> For more information, browse to gerbv's web site:
:
:>http://gerbv.sourceforge.net/
[...]

: Is there a version for Windoz?

Hello again!

By popular demand, one of our team put together a Windows ready gerbv
installer. It should represent a self-contained Windows version of
our latest gerbv release, gerbv-2.0.1. Windows users can grab the
release from gerbv's SourceForge download site here:

http://sourceforge.net/project/showfiles.php?group_id=33921

The file to grab is called gerbvinst-2.0.1.exe.
Click to expand...
I tried using this and it crashes when I try to open a Gerber or XYRS
file. Is there a forum for support?

Rick
 
rickman <gnuarm@gmail.com> writes:
Once I loaded my top side gerber file the refresh rate got really
slow.
Click to expand...
Try reducing the quality setting in gerbv. At max quality, it really
needs a graphics card and library that can do the shading it needs in
a reasonable time. I have a Fedora core duo with an nvidia 7950 and
it's still not fast enough to render in a reasonable time, but other
people with other configurations find it to be speedy.
 
On Apr 22, 10:23 am, DJ Delorie <d...@delorie.com> wrote:
rickman <gnu...@gmail.com> writes:
I tried using this and it crashes when I try to open a Gerber or XYRS
file. Is there a forum for support?

gerbv uses the geda-user mailing list:http://www.geda.seul.org/mailinglist/
Click to expand...
I found it and have exchanged a few posts. It seems the Windows port
is *very* new and not ready for prime time. I sent some Gerber files
off to a volunteer so he could try isolating the problem.

I like some things about gerbv and am not sure of others. Once I
loaded my top side gerber file the refresh rate got really slow. In
FreePCB the zoom is virtually real time as you roll the scroll wheel.
Each click of the wheel in gerbv is 2 second and this is not an over
complex board... although I have used flood fill. The refresh time
also goes up with more layers. Maybe this is a Windows only issue and
will improve as the graphics code is optimized for Windows.
 
On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
<mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall
Click to expand...
Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave
 
Jim Thompson wrote:
On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson
Click to expand...
For *diode shapers*? Wow, great idea, I'll get right on it, as soon as
I finish my .NET visualization tool for helping pigs decide on their
lipstick colour. ;)

If you really want to do this, you can kluge it up pretty fast from a
singular value decomposition routine, e.g. SVDFIT from Numerical
Recipes, with an optimization loop that moves the fit points around to
minimize the residual. For linear fits, you use a set of triangular
eigenfunctions, each of which goes from 0 at point m-1 to 1 at point m
to 0 again at point m+1. Any piecewise linear approximation is a
weighted sum of those.

I did this a couple of months ago with cubic splines for a tunnel
junction parameter extraction program--it needed speeding up so I could
generalize it to finite temperature, which takes a lot more computation.
The spline bit took about half a day, and it works great, but I have
to go back and finish debugging the finite-temperature part. :(

Cheers,

Phil Hobbs

Cheers,

Phil Hobbs
 
On Thu, 12 Jun 2008 11:02:15 -0400, Phil Hobbs
<pcdhSpamMeSenseless@pergamos.net> wrote:

Jim Thompson wrote:
On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson

For *diode shapers*? Wow, great idea, I'll get right on it, as soon as
I finish my .NET visualization tool for helping pigs decide on their
lipstick colour. ;)

If you really want to do this, you can kluge it up pretty fast from a
singular value decomposition routine, e.g. SVDFIT from Numerical
Recipes, with an optimization loop that moves the fit points around to
minimize the residual. For linear fits, you use a set of triangular
eigenfunctions, each of which goes from 0 at point m-1 to 1 at point m
to 0 again at point m+1. Any piecewise linear approximation is a
weighted sum of those.

I did this a couple of months ago with cubic splines for a tunnel
junction parameter extraction program--it needed speeding up so I could
generalize it to finite temperature, which takes a lot more computation.
The spline bit took about half a day, and it works great, but I have
to go back and finish debugging the finite-temperature part. :(

Cheers,

Phil Hobbs

Cheers,

Phil Hobbs
Click to expand...
My approach to "diode shapers" uses OpAmps, so I don't have to contend
with diode vagaries.

"Numerical Recipes", the book I presume? I think I've opened it once
or twice since I bought it a very long time ago ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave
 
Jim Thompson wrote:
On Thu, 12 Jun 2008 11:02:15 -0400, Phil Hobbs
pcdhSpamMeSenseless@pergamos.net> wrote:

Jim Thompson wrote:
General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson
For *diode shapers*? Wow, great idea, I'll get right on it, as soon as
I finish my .NET visualization tool for helping pigs decide on their
lipstick colour. ;)

My approach to "diode shapers" uses OpAmps, so I don't have to contend
with diode vagaries.
Click to expand...
Sometimes I envy you all the transistors you can use. Here I spend
years just trying to make one or two useful devices, and all the while,
you're squandering them on breakpoint amplifiers. ;)

Widlar (iirc) published a cute trick using BJT saturation for making
breakpoint amplifiers--you run a bunch of emitter followers whose bases
connect to the summing junction, and their emitters to the output via
resistors, with collector resistors to some appropriate reference. When
a transistor saturates, its beta drops to zilch, and the emitter
resistor suddenly appears in parallel with the feedback resistor. It's
reasonably temperature independent because the switchover depends on VCE
instead of VBE, and it has much sharper edges than a garden-variety
diode breakpoint amp.

"Numerical Recipes", the book I presume? I think I've opened it once
or twice since I bought it a very long time ago ;-)
Click to expand...
Yes, it's a pretty good book attached to some reasonably functional
although sometimes ugly code. I built a shared library out of it some
years back, because (unlike most other numerical codes I've seen) NR's
documentation quality is excellent and the number of actual bugs is
quite small.

Cheers,

Phil Hobbs
 
On Wed, 11 Jun 2008 17:54:52 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson
Click to expand...
Yes, a long time ago. I've also used Excel, believe it or not.
Mathematicians tend to define "best" in terms of least squares, but
often (at least in instrumentation design) what you want to minimize
is the maximum abs. value of error everywhere within a range. I have
access to Mathcad these days, so I might try that if Excel didn't
work.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On Thu, 12 Jun 2008 12:53:22 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Wed, 11 Jun 2008 17:54:52 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson

Yes, a long time ago. I've also used Excel, believe it or not.
Mathematicians tend to define "best" in terms of least squares, but
often (at least in instrumentation design) what you want to minimize
is the maximum abs. value of error everywhere within a range. I have
access to Mathcad these days, so I might try that if Excel didn't
work.
Best regards,
Spehro Pefhany
Click to expand...
Least squares _would_ get messy. I'll try Excel. PSpice can do it
but it's a tedious process of tweak-tweak-tweak :-(

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave
 
On Wed, 11 Jun 2008 17:54:52 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson
Click to expand...
A nifty way to do it if the function you're trying to fit has an analytical
derivative is this:

Create a stepped approximation to the derivative of the function you're
trying to fit; in this case find a stepped approximation to a cosine.

Integrate the stepped approximation and you will get a linear segment
approximation.

The slopes of the linear segments are, of course, the values of the steps.
The start and finish point of each linear segment is the same as the start
and finish of each associated step.

It may not be the exact minimum error fit, but it's really fast to compute
and it's good enough for the sort of thing the OP wants. If you want
better accuracy, generate more steps.

See the graphic over on ABSE.
 
On Thu, 12 Jun 2008 22:57:25 -0700, The Phantom <phantom@aol.com>
wrote:

On Wed, 11 Jun 2008 17:54:52 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson

A nifty way to do it if the function you're trying to fit has an analytical
derivative is this:

Create a stepped approximation to the derivative of the function you're
trying to fit; in this case find a stepped approximation to a cosine.

Integrate the stepped approximation and you will get a linear segment
approximation.

The slopes of the linear segments are, of course, the values of the steps.
The start and finish point of each linear segment is the same as the start
and finish of each associated step.

It may not be the exact minimum error fit, but it's really fast to compute
and it's good enough for the sort of thing the OP wants. If you want
better accuracy, generate more steps.

See the graphic over on ABSE.
Click to expand...
I see an EXE and a bunch of RAR files over on ABSE. What do I do with
them ?:)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave
 
On Fri, 13 Jun 2008 07:04:46 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Thu, 12 Jun 2008 22:57:25 -0700, The Phantom <phantom@aol.com
wrote:

On Wed, 11 Jun 2008 17:54:52 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson

A nifty way to do it if the function you're trying to fit has an analytical
derivative is this:

Create a stepped approximation to the derivative of the function you're
trying to fit; in this case find a stepped approximation to a cosine.

Integrate the stepped approximation and you will get a linear segment
approximation.

The slopes of the linear segments are, of course, the values of the steps.
The start and finish point of each linear segment is the same as the start
and finish of each associated step.

It may not be the exact minimum error fit, but it's really fast to compute
and it's good enough for the sort of thing the OP wants. If you want
better accuracy, generate more steps.

See the graphic over on ABSE.

I see an EXE and a bunch of RAR files over on ABSE. What do I do with
them ?:)
Click to expand...
Those aren't for you. You want the one called "Linear segment approximation
method".

...Jim Thompson
Click to expand...
 
On 13 Jun 2008 11:11:02 -0500, The Phantom <phantom@aol.com> wrote:

On Fri, 13 Jun 2008 07:04:46 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Thu, 12 Jun 2008 22:57:25 -0700, The Phantom <phantom@aol.com
wrote:

On Wed, 11 Jun 2008 17:54:52 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

On Wed, 11 Jun 2008 09:33:12 +1000, Mike Kendall
mikekendall@introspec.com> wrote:

Can someone please direct me to a passive circuit using breakpoint
diodes, preferably no more than six, to shape a sine wave from a 5Vpp
triangle? The available power source is single supply 6V.

I did check the net, but had no luck with finding a basic approach.

Mike Kendall

Patent:3737642 shows one way to do it.

General question comes to mind... has anyone written a program that
would derive the "best" piecewise linear fit to a function, f(x), for
a given number of segments?

...Jim Thompson

A nifty way to do it if the function you're trying to fit has an analytical
derivative is this:

Create a stepped approximation to the derivative of the function you're
trying to fit; in this case find a stepped approximation to a cosine.

Integrate the stepped approximation and you will get a linear segment
approximation.

The slopes of the linear segments are, of course, the values of the steps.
The start and finish point of each linear segment is the same as the start
and finish of each associated step.

It may not be the exact minimum error fit, but it's really fast to compute
and it's good enough for the sort of thing the OP wants. If you want
better accuracy, generate more steps.

See the graphic over on ABSE.

I see an EXE and a bunch of RAR files over on ABSE. What do I do with
them ?:)

Those aren't for you. You want the one called "Linear segment approximation
method".


...Jim Thompson
Click to expand...
OK. What process did you use to space the segments? (I'm not
conversant in Mathematica.)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave
 
On Fri, 13 Jun 2008 09:34:19 -0700, Jim Thompson wrote

<SNIP>
Those aren't for you. You want the one called "Linear segment approximation
method".


...Jim Thompson

OK. What process did you use to space the segments? (I'm not
conversant in Mathematica.)

...Jim Thompson
Click to expand...
You just plot a certain function of t and you will get the steps.

For the first sine graph, use:

(Ceiling(y+Cos(t))/y + Floor(y+Cos(t))/y)/2

where y is the number of steps you want. You will get a good approximation for
any value of y, but if you make it an integer plus .66, you will get slightly
lower distortion than otherwise.

For the second sine graph, the one with a flat on top, use:

(Round(y+Cos(t))/y

where y is the number of steps you want. Make y an integer plus .16 for best
results.

For positive numbers:

Ceiling(z) means the integer just greater than z (the integer part of z plus 1).

Floor(z) means the integer just less than z (the integer part of z).

Round(z) means the integer part of (z + .5).

Make the obvious changes for negative numbers.
 
On 13 Jun 2008 14:01:02 -0500, The Phantom <phantom@aol.com> wrote:

On Fri, 13 Jun 2008 09:34:19 -0700, Jim Thompson wrote

SNIP

Those aren't for you. You want the one called "Linear segment approximation
method".


...Jim Thompson

OK. What process did you use to space the segments? (I'm not
conversant in Mathematica.)

...Jim Thompson

You just plot a certain function of t and you will get the steps.

For the first sine graph, use:

(Ceiling(y+Cos(t))/y + Floor(y+Cos(t))/y)/2

where y is the number of steps you want. You will get a good approximation for
any value of y, but if you make it an integer plus .66, you will get slightly
lower distortion than otherwise.

For the second sine graph, the one with a flat on top, use:

(Round(y+Cos(t))/y

where y is the number of steps you want. Make y an integer plus .16 for best
results.

For positive numbers:

Ceiling(z) means the integer just greater than z (the integer part of z plus 1).

Floor(z) means the integer just less than z (the integer part of z).

Round(z) means the integer part of (z + .5).

Make the obvious changes for negative numbers.
Click to expand...
Great!

My oldest son, Aaron, wrote (with some pointers from Brian Hirasuna)
these for me for PSpice a number of years ago ...

..FUNC FRACT(X) {(ATAN(TAN(((X+1e-11)-0.5)*PI))/PI+0.5)}
..FUNC TRUNC(X) {((X)-FRACT(X))}
..FUNC ROUND(X) {(TRUNC((X)+0.5))}
..FUNC BIT(X,Y) {(SGN(X-(2**Y)+0.1)+1)/2}
..FUNC DIV(X,MOD) {TRUNC((X+1u)/MOD)}
..FUNC MODULO(X,MOD) {(FRACT(X/MOD))*MOD}
..FUNC INT(X) {((X)-FRACT(X))}

I had forgotten I had them... had to do a HD search to remember where
they were ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave
 
On 13 Jun 2008 14:01:02 -0500, The Phantom <phantom@aol.com> wrote:

On Fri, 13 Jun 2008 09:34:19 -0700, Jim Thompson wrote

SNIP

Those aren't for you. You want the one called "Linear segment approximation
method".


...Jim Thompson

OK. What process did you use to space the segments? (I'm not
conversant in Mathematica.)

...Jim Thompson

You just plot a certain function of t and you will get the steps.

For the first sine graph, use:

(Ceiling(y+Cos(t))/y + Floor(y+Cos(t))/y)/2

where y is the number of steps you want. You will get a good approximation for
any value of y, but if you make it an integer plus .66, you will get slightly
lower distortion than otherwise.

For the second sine graph, the one with a flat on top, use:

(Round(y+Cos(t))/y

where y is the number of steps you want. Make y an integer plus .16 for best
results.

For positive numbers:

Ceiling(z) means the integer just greater than z (the integer part of z plus 1).

Floor(z) means the integer just less than z (the integer part of z).

Round(z) means the integer part of (z + .5).

Make the obvious changes for negative numbers.
Click to expand...
Mr. Phantom,

Please comment on this discussion...

http://mathforum.org/library/drmath/view/71202.html

Which convention is generally followed with negative numbers?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave
 
On Sun, 15 Jun 2008 14:54:49 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:

<SNIP>
Mr. Phantom,

Please comment on this discussion...

http://mathforum.org/library/drmath/view/71202.html

Which convention is generally followed with negative numbers?

...Jim Thompson
I think there are good reasons to use the round-to-even method.
Click to expand...

See: http://en.wikipedia.org/wiki/Rounding

Also, Knuth in Vol 2 of "The Art of Computer Programming" discusses rounding.
 
"Joel Koltner" <zapwireDASHgroups@yahoo.com> writes:

"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message
news:485145A5.3030509@electrooptical.net...
Yes, it's a pretty good book attached to some reasonably functional although
sometimes ugly code.

I have a suspicion that all those high-powered math guys who initlally created
the contents are often long gone and they're just hiring some generic
programmers to port it from language to language, using some sort of
regression testing to make sure nothing gets broken in the process.

Not to mention they have some bizarre licensing scheme where just buying the
book doesn't entitle you to use the printed code -- that's a separate
purchase!
Click to expand...
That was the major disappointment for me. The book is not cheap,
then they *still* want money off you if you use the contents!

--

John Devereux
 
John Devereux wrote:
"Joel Koltner" <zapwireDASHgroups@yahoo.com> writes:

"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message
news:485145A5.3030509@electrooptical.net...
Yes, it's a pretty good book attached to some reasonably functional although
sometimes ugly code.
I have a suspicion that all those high-powered math guys who initlally created
the contents are often long gone and they're just hiring some generic
programmers to port it from language to language, using some sort of
regression testing to make sure nothing gets broken in the process.

Not to mention they have some bizarre licensing scheme where just buying the
book doesn't entitle you to use the printed code -- that's a separate
purchase!

That was the major disappointment for me. The book is not cheap,
then they *still* want money off you if you use the contents!
Click to expand...
There's a whole pile of better numerical code out there, once you figure
out what you want to do--I bought the floppy disc back in the day, which
entitled me to use it myself. I've been doing that for about 15 years,
which makes it pretty cheap at the price.

Cheers,

Phil Hobbs
 
Phil Hobbs <pcdhSpamMeSenseless@pergamos.net> writes:

John Devereux wrote:
"Joel Koltner" <zapwireDASHgroups@yahoo.com> writes:

"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in
message news:485145A5.3030509@electrooptical.net...
Yes, it's a pretty good book attached to some reasonably
functional although sometimes ugly code.
I have a suspicion that all those high-powered math guys who
initlally created the contents are often long gone and they're just
hiring some generic programmers to port it from language to
language, using some sort of regression testing to make sure
nothing gets broken in the process.

Not to mention they have some bizarre licensing scheme where just
buying the book doesn't entitle you to use the printed code --
that's a separate purchase!

That was the major disappointment for me. The book is not cheap,
then they *still* want money off you if you use the contents!


There's a whole pile of better numerical code out there, once you
figure out what you want to do--I bought the floppy disc back in the
day, which entitled me to use it myself. I've been doing that for
about 15 years, which makes it pretty cheap at the price.
Click to expand...
I've just reread the available licenses (in the book). They appear to
want to license per instance of any algorithm used from the book.

Prices from $65 per instance...

Actually they say "per screen". So I guess it is free for my embedded
systems after all :)

--

John Devereux
 
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