Error in lbfgsAdd (line 21): lbfgsAddC(​y,s,Y,S,ys​,int32(lbf​gs_end)) -- Unrecognized function or variable 'lbfgsAddC'

Running the code from lbfgsAdd.m and I get the error bfgsAdd (line 21): lbfgsAddC(y,s,Y,S,ys,int32(lbfgs_end)) -- Unrecognized function or variable 'lbfgsAddC'. How do I solve this?

[Torsten]

Does this help ?

https://github.com/amaas/stanford_dl_ex/issues/3

[Julia Gorman]

No, but ive looked a little more and in the same directory as lbfgsAdd.m is a lbfgsAddC.c is a folder mex and in it is lbfgsAddC.c how do i get this line in lbfgsAdd.m to work

>> demoLearning Unrecognized function or variable 'lbfgsAddC'. Error in lbfgsAdd (line 21) lbfgsAddC(y,s,Y,S,ys,int32(lbfgs_end));

how do i get this line in lbfgsAdd.m to work? Ive tried Chat GPT which told me to type this into the comand line where lbfgsAddC.c i is located: mex lbfgsAddC.c

This than gave me this error: >> mex lbfgsAddC.c

Warning: Xcode is installed, but its license has not been accepted. Run Xcode and accept its

license agreement.

Error using mex

Supported compiler not detected. For options, visit https://www.mathworks.com/support/compilers.

From there I don't know what to do since I am running R2023b from an Apple Silicon Computer

[Torsten]

Can't you do what is suggested in my above link:

solve it with modifying ex1a_linreg.m line 46 to

options = struct('useMex',0);

?

In this case, MATLAB will just use the .m file, not the mex-file.

[Walter Roberson]

https://apple.stackexchange.com/questions/175069/how-to-accept-xcode-license

Answer 1

[Julia Gorman]

I ended up solving this by running mex lbfgsAddC.c and then moving the output of that to the same folder as lbfgsAdd.m and it worked. Thanks for the help though!