"Logic" Problem

J

Jim Thompson

Guest
PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Jim Thompson wrote:
PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson
Click to expand...
In C your code would be most compact with

if (P%3 == 0) ... // 3, 6, 9, etc
if (P%3 == 1) ... // 1, 4, etc
if (P%3 == 2) ... // 2, 5, etc

I don't know if PSpice has a MOD operator (% in C), but you might want
to check.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
 
On Tue, 18 May 2004 10:07:42 -0700, Tim Wescott
<tim@wescottnospamdesign.com> wrote:

Jim Thompson wrote:
PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson

In C your code would be most compact with

if (P%3 == 0) ... // 3, 6, 9, etc
if (P%3 == 1) ... // 1, 4, etc
if (P%3 == 2) ... // 2, 5, etc

I don't know if PSpice has a MOD operator (% in C), but you might want
to check.
Click to expand...
That's what I first thought of too, unfortunately PSpice does not have
the MOD operator :-(

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Jim Thompson wrote:

PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18
Click to expand...
(P-1) modulo 3

modulo, in this case means discard the upper bits.

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
 
On Tue, 18 May 2004 10:07:42 -0700, Tim Wescott
<tim@wescottnospamdesign.com> wrote:

Jim Thompson wrote:
PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson

In C your code would be most compact with

if (P%3 == 0) ... // 3, 6, 9, etc
if (P%3 == 1) ... // 1, 4, etc
if (P%3 == 2) ... // 2, 5, etc

I don't know if PSpice has a MOD operator (% in C), but you might want
to check.
Click to expand...
You CAN build your own "functions" in PSpice. How would you
accomplish MOD using other operators?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Jim Thompson wrote:
On Tue, 18 May 2004 10:07:42 -0700, Tim Wescott
tim@wescottnospamdesign.com> wrote:


Jim Thompson wrote:

PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson

In C your code would be most compact with

if (P%3 == 0) ... // 3, 6, 9, etc
if (P%3 == 1) ... // 1, 4, etc
if (P%3 == 2) ... // 2, 5, etc

I don't know if PSpice has a MOD operator (% in C), but you might want
to check.


You CAN build your own "functions" in PSpice. How would you
accomplish MOD using other operators?

...Jim Thompson
Click to expand...
x mod y = x - y * floor(x / y).

This assumes that you have a 'floor' function. If it's all integer
arithmetic you're in luck, as x / y generally returns an integer equal
to floor(x / y).

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
 
Rene Tschaggelar wrote:

Jim Thompson wrote:

PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18


(P-1) modulo 3

modulo, in this case means discard the upper bits.

Rene
Click to expand...
Or would, if 3 were an integer exponential of 2. Since it isn't you
have to use a real modulo function of some sort.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
 
On a sunny day (Tue, 18 May 2004 09:43:52 -0700) it happened Jim Thompson
<thegreatone@example.com> wrote in
<vfdka05bivpi097ktml97hidnc22at0nbh@4ax.com>:

PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!
Click to expand...
a = input;
b = 0;
for(i = 0; i < 6; i++)
{
if(a == (1 + b) ) result = RED
if(a == (2 + b) ) result = GREEN
if(a == (3 + b) ) result = BLEU

b = b + 3;
}

That will be $59.50 ex tax.
For testing it I charge 150$ / hour.
JP
 
On a sunny day (Tue, 18 May 2004 10:07:42 -0700) it happened Tim Wescott
<tim@wescottnospamdesign.com> wrote in <10akgmj6k68t90d@corp.supernews.com>:

Jim Thompson wrote:
PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson

In C your code would be most compact with

if (P%3 == 0) ... // 3, 6, 9, etc
if (P%3 == 1) ... // 1, 4, etc
if (P%3 == 2) ... // 2, 5, etc
Shit better then mine :)
Click to expand...
JP
 
On a sunny day (Tue, 18 May 2004 10:10:58 -0700) it happened Jim Thompson
<thegreatone@example.com> wrote in
<oqgka0hsqk11b1jv341h8t07e0mf0q8mts@4ax.com>:

On Tue, 18 May 2004 10:07:42 -0700, Tim Wescott
tim@wescottnospamdesign.com> wrote:

Jim Thompson wrote:
PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson

In C your code would be most compact with

if (P%3 == 0) ... // 3, 6, 9, etc
if (P%3 == 1) ... // 1, 4, etc
if (P%3 == 2) ... // 2, 5, etc

I don't know if PSpice has a MOD operator (% in C), but you might want
to check.

That's what I first thought of too, unfortunately PSpice does not have
the MOD operator :-(
AHA, back to my solution :)
Click to expand...
JP
 
This speeds it up a bit, as it exits the loop immediatly
if a match is found:

a = input;
b = 0;
for(i = 0; i < 6; i++)
{
if(a == (1 + b) ) {result = RED; break;}
if(a == (2 + b) ) {result = GREEN; break;}
if(a == (3 + b) ) {result = BLEU; break;}

b = b + 3;
}

JP
 
On Tue, 18 May 2004 10:07:42 -0700, Tim Wescott
<tim@wescottnospamdesign.com> wrote:

Jim Thompson wrote:
PSpice Simulation Problem:

I have a (decimal) parameter (P) that varies from 1 thru 18 in steps
of 1.

With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities, how do I most compactly separate the following events:

P = 1 or 4 or 7 or 10 or 13 or 16

P = 2 or 5 or 8 or 11 or 14 or 17

P = 3 or 6 or 9 or 12 or 15 or 18

Thanks!

...Jim Thompson

In C your code would be most compact with

if (P%3 == 0) ... // 3, 6, 9, etc
if (P%3 == 1) ... // 1, 4, etc
if (P%3 == 2) ... // 2, 5, etc

I don't know if PSpice has a MOD operator (% in C), but you might want
to check.
Click to expand...
Tim, Thanks for jogging my memory. You caused me to recall that my
oldest son had written some functions for me. Searching my hard-drive
found them ;-)

*
..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 MODULO(X,MOD) {(FRACT(X/MOD))*MOD}
..PARAM PI = 3.141593
*

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
On Tue, 18 May 2004 18:21:46 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

This speeds it up a bit, as it exits the loop immediatly
if a match is found:

a = input;
b = 0;
for(i = 0; i < 6; i++)
{
if(a == (1 + b) ) {result = RED; break;}
if(a == (2 + b) ) {result = GREEN; break;}
if(a == (3 + b) ) {result = BLEU; break;}

b = b + 3;
}

JP
Click to expand...
Why loop in the first place?

IF(N+2)/3 = INT((N+2)/3) THEN Group=1
IF(N+1)/3 = INT((N+1)/3) THEN Group=2
IF(N+0)/3 = INT((N+0)/3) THEN Group=3

in some programming languages you can invert the
backslash to get the same result as above...

IF(N+2)/3 = (N+2)\3 THEN Group=1
IF(N+1)/3 = (N+1)\3 THEN Group=2
IF(N+0)/3 = (N+0)\3 THEN Group=3
 
On a sunny day (Fri, 21 May 2004 15:47:51 GMT) it happened
bschwabe@atlanta.nsc.com (Beau Schwabe) wrote in
<40ae2344.693681163@usenet.nsc.com>:

On Tue, 18 May 2004 18:21:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

This speeds it up a bit, as it exits the loop immediatly
if a match is found:

a = input;
b = 0;
for(i = 0; i < 6; i++)
{
if(a == (1 + b) ) {result = RED; break;}
if(a == (2 + b) ) {result = GREEN; break;}
if(a == (3 + b) ) {result = BLEU; break;}

b = b + 3;
}

JP

Why loop in the first place?

IF(N+2)/3 = INT((N+2)/3) THEN Group=1
IF(N+1)/3 = INT((N+1)/3) THEN Group=2
IF(N+0)/3 = INT((N+0)/3) THEN Group=3
Clever!
Click to expand...
Does he have INT?
JP
 
On Fri, 21 May 2004 18:34:37 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 21 May 2004 15:47:51 GMT) it happened
bschwabe@atlanta.nsc.com (Beau Schwabe) wrote in
40ae2344.693681163@usenet.nsc.com>:

On Tue, 18 May 2004 18:21:46 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

This speeds it up a bit, as it exits the loop immediatly
if a match is found:

a = input;
b = 0;
for(i = 0; i < 6; i++)
{
if(a == (1 + b) ) {result = RED; break;}
if(a == (2 + b) ) {result = GREEN; break;}
if(a == (3 + b) ) {result = BLEU; break;}

b = b + 3;
}

JP

Why loop in the first place?

IF(N+2)/3 = INT((N+2)/3) THEN Group=1
IF(N+1)/3 = INT((N+1)/3) THEN Group=2
IF(N+0)/3 = INT((N+0)/3) THEN Group=3
Clever!
Does he have INT?
JP
Click to expand...
As originally stated...

"With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities"

....With this I would imagine a relatively simple function such as
INT would be available.
 
On a sunny day (Fri, 21 May 2004 19:05:52 GMT) it happened
bschwabe@atlanta.nsc.com (Beau Schwabe) wrote in
<40ae4f0e.704893501@usenet.nsc.com>:

IF(N+2)/3 = INT((N+2)/3) THEN Group=1
IF(N+1)/3 = INT((N+1)/3) THEN Group=2
IF(N+0)/3 = INT((N+0)/3) THEN Group=3
Clever!
Does he have INT?
JP

As originally stated...

"With only IF-THEN-ELSE, AND (&), OR (|) and Algebraic operator
capabilities"

...With this I would imagine a relatively simple function such as
INT would be available.
yes, but he did no thave modulus either...
Click to expand...
JP
 
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