coder.extrinsic size mismatch

I use in a function:

STDinputs(nset1,nimp1)=nanstd(inputstemp,0,2);

AVinputs(nset1,nimp1)=nanmean(inputstemp,2);

inputstemp size is (100,33,2000);

nset1=1:100;

nimp1=1:2000;

This 2 lines works very well in Matlab code but when I try to compile mex file using :

coder.extrinsic('nanstd','nanmean');

compiler return this error:

    "MATLAB expression 'nanstd' is not of the correct size: expected [100x2000] found [100x1x2000]."

What's wrong?

I use "codegen" in this modality:

cfg=coder.config; 
cfg.ResponsivenessChecks = false; 
cfg.ExtrinsicCalls = true; 
cfg.IntegrityChecks = false; 
cfg.SaturateOnIntegerOverflow = false;
codegen -config cfg OPTIM2_GeneticPattern -args {zeros(100,82,'double')};

I want to import nanstd & nanmean in a mex file but size of imputstemp is not recognized well and it return an error.

Answer 1

[Walter Roberson]

You are taking nanstd() of a 3D array along the second dimension. The result is going to have a full first and third dimension and a second dimension of 1, but you are expecting the second dimension to have vanished. You should either be assigning to a variable that has a second dimension of 1, or you should be using squeeze(), or you should permute(inputstemp, [1 3 2]) and nanmean along the third dimension so that it will be the trailing dimension that will vanish.

[Emiliano Rosso]

thank you so much I successfully solved!

STDinputs(nset1,nimp1)=squeeze(nanstd(inputstemp,0,2)); 
AVinputs(nset1,nimp1)=squeeze(nanmean(inputstemp,2));