How can I give a number to a symbolic variable in MATLAB?
24,423
Solution 1
use eval
syms a;
answer = exp(-10*a);
a=40;
eval(answer)
ans =
1.9152e-174
Solution 2
You can use the SUBS function from the Symbolic Math Toolbox to perform symbolic substitution.
syms a;
answer = exp(-10*a);
subs(answer,a,40)
ans =
1.9152e-174
Comments
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peaceman almost 2 years
I try to declare a symbolic variable in MATLAB with this code:
syms a;
I do my computation on this variable and all thing is fine. But my problem is that, I don't know how can I give a number to variable and get the result as a number. For example the answer of my code is
answer=exp(-10*a);
For instance I want to give 40 to "a" and get the answer as
answer = 1.9152e-174
I really appreciate any suggestion.