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T O P I C    R E V I E W
LCG Posted - 12/06/2012 : 6:43:55 PM
Hello,

I've programmed this in OriginLab9.0 and I'm getting an error in the quick check that says :" "for (H" is not a valid Equation. The left hand side of '=' should be a variable."

I'm not sure how to fix that because I'm not sure what it means.
Here's the entire function body. Thanks for any help.

A=Ki*Kg;

B=Ki+Kg+Ki*Kg*It+Ki*Kg*x-Ki*Kg*Ht;

C=1+Ki*It+Kg*x-(Ki+Kg)*Ht;

D=-Ht;

for (H=Ht, step=1; abs(step)>1E-15; H=H-step){

step=(a*H*H*H+b*H*H+c*H+d)/(3*a*H*H+2*b*H+c);};

y=Ei +((Ki*H*Ehi-Ki*H*Ei) / (1+Ki*H))
3   L A T E S T    R E P L I E S    (Newest First)
Sam Fang Posted - 12/08/2012 : 02:56:17 AM
It seems there is a redundant semicolon in your script:
-----------------------------

for (H=Ht, step=1; abs(step)>1E-15; H=H-step) {

step=(a*H*H*H+b*H*H+c*H+d) / (3*a*H*H+2*B*H+c) ; } ;

------------------------------

It should be changed as:
-----------------------------

for (H=Ht, step=1; abs(step)>1E-15; H=H-step) {

step=(a*H*H*H+b*H*H+c*H+d) / (3*a*H*H+2*B*H+c) ; }

------------------------------

Sam
OriginLab Technical Services
LCG Posted - 12/07/2012 : 8:19:19 PM
Thank you Sam for answering. I've changed to labscript and I had to change something in my equation, so now it's

A=Ki*Kg;

B=Ki+Kg+Ki*Kg*It+Ki*Kg*x-Ki*Kg*Ht;

C=1+Ki*It+Kg*x-(Ki+Kg)*Ht;

D=-Ht;

for (H=Ht, step=1; abs(step)>1E-15; H=H-step) {

step=(a*H*H*H+b*H*H+c*H+d) / (3*a*H*H+2*B*H+c) ; } ;

y=It *(Ei+Ehi*Ki*H)/ (1+Ki*H)

Where Ki,Kg,Ei,Ehi are parameters and It and Ht are constants but now I'm getting this error when I do the quick check.

y = 0 (Variable(s) "Ehi,y,Ei" not used)

Thank you again for your help.


quote:
Originally posted by Sam Fang

You should choose LabTalk Script instead of Equations in Function Type of Name and Type page. Equations doesn't support for script.

Sam
OriginLab Technical Services
Sam Fang Posted - 12/07/2012 : 12:46:27 AM
You should choose LabTalk Script instead of Equations in Function Type of Name and Type page. Equations doesn't support for script.

Sam
OriginLab Technical Services

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