# Subs Command & Conversion into Matlab Function (multivariable)

3 views (last 30 days)
Alex Santizo on 7 Feb 2020
Answered: Jyothis Gireesh on 10 Feb 2020
syms t g f
g=t*sin*(1/2*t)+ln(t-1)
f=diff(g,t)
subs (f,t,4/3)
%Also need to solve by conversion into a matlab function
Walter Roberson on 7 Feb 2020
You need to pass a value to sin instead of multiply sin itself by something
t*sin(t/2)
For example.

Jyothis Gireesh on 10 Feb 2020
Here are a few pointers which may be able to help you:
• As explained by Mr. Walter Roberson above, you need to pass an input argument to the “sin()” function. Or else it will be flagged as an error at run-time.
• I am assuming here that you want to convert the symbolic expression in “f” to a MATLAB function. You may use the “matlabFunction()”to achieve this result.
Please refer to the following documentation link on “matlabFunction()” for any clarifications
Hope this helps!!

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