Funny Behavior When Doing Substitution w/ matlabFunction Files
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William Wooley
am 17 Dez. 2015
Kommentiert: Walter Roberson
am 17 Dez. 2015
I have a symbolic function that I convert to a numeric file using matlabFunction. Then, using the find_and_replace function from the file exchange I substituted out several arguments and replace them with elements of a matrix.
So whereas before my function was something like
function H = H(arg1a,arg2a,arg1b,arg2b)
H = arg1a + arg2a + arg1b + arg2b;
end
It is now
function H = H(arg_a,arg_b)
H = arg_a(1) + arg_a(2) + arg_b(1) + arg_b(2);
end
Two odd things happen:
- If I try to run the second function I get the error 'Not enough input arguments.'
- If I a) open the script b.) delete a semicolon c.) save d.) add the semicolon e.) save, then everything runs well.
Any ideas of what might be going on here?
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Walter Roberson
am 17 Dez. 2015
MATLAB did not detect that you had modified the file and used the one that was already in its cache. It would also have worked if you had used
clear H
When-ever you use code to modify a .m file that you have executed, you should "clear" the function.
Note that there is a better way of doing what you did. See http://www.mathworks.com/help/symbolic/matlabfunction.html#zmw57dd0e82644 and the example "Now, convert an expression r to a MATLAB function whose second input argument is a vector."
2 Kommentare
Walter Roberson
am 17 Dez. 2015
I think it might be relatively new. I only noticed that in the documentation a few months ago.
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