Unrecognized function or variable 'fpval'.

Hello

Can you please guide me on how to fix the following error:

Unrecognized function or variable 'fpval'.

Error in stepwisefit>stepcalc (line 368)

pval = fpval(fstat,df0,dfe);

Error in stepwisefit (line 150)

[B,SE,PVAL,stats] = stepcalc(allx,y,in);

Error in newrobuststepwise (line 28)

[b,se,pval1,inmodel1,stats,nextstep,history] = stepwisefit(Xdata,Ydata);

I used a stepwise function whose parameter pval is one of its outputs

Answer 1

[Kojiro Saito]

fpval is a private function of Statistics and Machine Learning Toolbox and located in MATLAB_Install/toolbox/stats/stats/private/fpval.m.

which fpval -all

/MATLAB/toolbox/stats/stats/private/fpval.m  % Private to stats

If you cannot find fpval.m with "which -all", you need to reinstall Statistics and Machine Learning Toolbox again.

[Samira Rahmati]

Thank you for your prompt response

Yes, I get the same answer with "which fpval -all"

But by running the code I have, I get the previous error and I don't know how to fix it

[Kojiro Saito]

@Samira Rahmati

OK. Could you try initializing MATLAB search path?

restoredefaultpath 

[Samira Rahmati]

Yes it was solved with your help

Thank you very much🙏🏻

[Kojiro Saito]

Good news!

restoredefaultpath only resets MATLAB search path in this session. You need to do savepath to save the path for next session.

restoredefaultpath
savepath

See: How will running the "restoredefaultpath" and "savepath" commands affect my custom paths and how do I back up my custom paths?