Why there is a Invalid Expresssion error in my fit function?
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Hyeon Soo Lee
on 19 May 2023
Commented: Hyeon Soo Lee
on 19 May 2023
I wrote this simple code
n = [1433;2700;1000000];
s = [1170.98;780.65;390.33];
f= fit(n,s,'power1')
But the error said "invalid expression. check for missing or extra characters"
I'm not very used to Matlab and I absolutely have no idea why this error occurs.
Ofc, I installed Curve Fitting Toolbox
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Accepted Answer
the cyclist
on 19 May 2023
Your code works:
n = [1433;2700;1000000];
s = [1170.98;780.65;390.33];
f= fit(n,s,'power1')
Did you perhaps try to spread that code across multple lines? You might need to use line continuation, if so.
3 Comments
the cyclist
on 19 May 2023
It's difficult to understand what is going on with your code, when it works perfectly fine here.
Do you get this problem from a freshly restarted MATLAB session? How are you calling these lines of code?
Are you sure you have the CF toolbox installed? What do you get if you type
which -all fit
from the command line?
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