MATLAB: Using a Symbolic Expression

Question

Hello,

I have one function that creates a symbolic expression for a variable, which is often lengthy. In another function, I am loading that symbolic expression and would like to evaluate that symbolic expression based upon parameters defined above.

For example, in my first function I solve for x to have the symbolic expression SymExpr = a*b*c. In my second function, I have a, b, and c defined as numeric values. I then load the saved symbolic expression SymExpr. I tried saying x = SymExpr, but this makes x a symbolic variable and x = char(SymExpr) but this makes x a string. I want x to be a double and I want to obtain the numeric value.

I know I could do this by just copying and pasting in the second function x = a*b*c, but my expressions from the first function can get very lengthy, so I'm trying to do this without having to copy/paste.

Thank you,

Kevin

Answer 1

For the expressions that exceed the maximum command line length, I was able to print them to a file instead of the command line and copy them from the file and paste into my function. There has to be an easier way of doing it though. There's probably some really simple solution that doesn't involve copying and pasting.