Error using horzcat dimensions

I'm having issues with my end output. It seems to be due to the id variable.

This is printed when ran;

Error using horzcat
Dimensions of arrays being concatenated are not consistent.

Error in week5analysis (line 30)
    output=[id dacc drt];
    
function [output]=week5analysis(data)
%input should create a directory of one or more files
files=dir(data);
%index k should correspond to the number of files within the directory
for k=1:size(files,1)
    %extracting id and converting to corresponding number
    id=(files(k).name(4:size(files(k).name,2)));
    %loading the files within the directory
    temp=load(files(k).name);
    %removes the first 10 practice trails in both conditions
    temp([1:10,51:60],:)=[]; 
    %condition 1
    c1=temp(temp(:,1)==1,:);
    %condition 2
    c2=temp(temp(:,1)==2,:);
    %displays the percentage of correct answers for condition 1
    acc1=sum(c1(:,2)==1)/numel(c1(:,2))*100;
    %displays the percentage of correct answers for condition 2
    acc2=sum(c2(:,2)==1)/numel(c2(:,2))*100;
    %mean of reaction time for correct trails in condition 1
    c1m=mean(c1(c1(:,2)==1,3));
    %mean of reaction time for correct trails in condition 2
    c2m=mean(c2(c2(:,2)==1,3));
    %difference between each condition for accuracy
    dacc=c1(:,2)-c2(:,2);
    %difference between each condition for reaction time
    drt=c1(:,3)-c2(:,3);
    %saves difference scores alongside id
    output=[id dacc drt];
end

Answer 1

[Star Strider]

I have no idea what your code does or what the variables are that you want to return.

The easiest approach is to return a cell array instead:

output = {id dacc drt};

Note the curly brackets {} denoting a cell array.

See the documentation on Cell Arrays if you are not familiar with them.

[Nicky Wiggs]

Amazing! That works almost perfectly, would it be possible to do it so its in numerical order for the id also?

[Stephen23]

"would it be possible to do it so its in numerical order for the id also?"

You could try my FEX submission:

https://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

[Nicky Wiggs]

Thats fantastic, thanks a lot!

[Star Strider]

@Nicky Wiggs — As always my pleasure!

@Stephen — Thanks for your addition.