Symbolic definition?

Forum|Forum|11 years ago
March 17, 2015
2 replies
2452 views

Hi!

I'm a bit new to the symbolic "abilities" in Mathcad 14. Is it possible to define something symbolic?

for example:

I would like to define:

Ma:= P*X - F*D and Mb:=P*X

and use the definitions in further symbolic calculations without have errors such as "this variabl is undefined" popping up.

best regards

Other

Best answer by LucMeekes

Yes there is.

Define P, X, F and D all with values and then symbolically undefine them:

P:= 1 P:=P

X:=1 X:=X etc.

Then the numeric processor will see them as defined, while the symbolic processor sees them as undefined.

Success!
Luc

R

RichardJ

19-Tanzanite

Actually, you can use the definitions in later symbolic calculations. The error messages about undefined variables are the numeric processor complaining, but the symbolic processor doesn't care (usually, anyway; there are exceptions).

S

snã¦ss

Author

8-Gravel

Thank you very much! Saved me a lot of time calculating symbolically (Castigilianos Theorem) ! you wouldn't by any chance know if I can turn the red color off of the variables with the error message?