Error: Not enough points to perform robust estimation.

[pauldhami]

Greetings,

First and foremost, thank you for this code. I am trying to use the CPM with my data (124 subjects), using the following basic command:

[y_predict, performance]= cpm_main(curdata, behvofi, 'pthresh',0.01,'kfolds',10)

I get no errors when using a p-threshold of 0.05, but as soon as I use 0.01 or smaller, I run into the following error.

# Running over 10 Folds.
Performing fold no. 1 2 Error using statrobustfit (line 21)
Not enough points to perform robust estimation.

Error in robustfit (line 114)
[varargout{:}] = statrobustfit(X,y,wfun,tune,wasnan,doconst,priorw,dowarn);

Error in cpm_train (line 22)
mdl=robustfit(summary_feature,y');

Error in cpm_cv (line 38)
    [~, ~, pmask, mdl] = cpm_train(x_train, y_train,pthresh);

Error in cpm_main (line 53)
[y_predict]=cpm_cv(x,y,pthresh,kfolds);

I am just curious as to what is the nature of this error? It is suggesting that there are not enough significant edges (at the p-threshold) to apply the CPM?

Any insight would be greatly appreciated.

Thank you,
Paul

[joy-neuro]

Hi Paul

I had the same error message as you and for me, there were some nans in the behavioral data. After getting rid of those, it worked. Hope this works for you as well!

Jo