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How to evaluate a user input function at a given point?

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Maryam Ansari
Maryam Ansari 2016-2-15
评论： Walter Roberson 2016-2-15
I'm unsure how to evaluate a given function at a given point X. Hypothetically, the user can input any function using any letter as a desired variable. How can I evaluate the function at the initial point given. I was thinking I could use the syms command. However, I'm unsure of what letter variable they would use. For instance, if the function was x+1 vs y+1, how can I ensure that the "initialX" is evaluated in place of x or y in the given function?
function y = randFunc(initialX, func)
y = func(initialX);
display(y);

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Matt J
Matt J 2016-2-15
编辑：Matt J 2016-2-15
If func is a Function Handle, then the code you've shown should do exactly what you want.
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Matt J
Matt J 2016-2-15
编辑：Matt J 2016-2-15
There are various ways, and they are explained at the link I gave you.
Walter Roberson
Walter Roberson 2016-2-15
In this case if func is given in the form of a symbolic expression, then use matlabFunction() to turn it into a function handle.

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