MATLAB: Matlab app designer confuses the end written inside matrix index with the end for if and for loop

app designerfor loopfunctionloopMATLABmatricesmatrix

Hi all
I got a piece of my code that is causing function nesting error and the root cause is that matlab is not understanding the end written in Matrix(end)
is not related to the loop or function end and has messed up
exactly where I haveTtot(end) , this end is confused
for fn=1:numel(files)
    
    ff= xlsread(strcat(files{fn},'.xlsx'));
    filename=files{fn};
    t = ff(:,1);
    resol=t(2)-t(1);
    motion6t=ff;
  
    mulnames=readcell('Ms.xlsx')
    mask = strcmp(filename, mulnames(:,1));
    multip = cell2mat(mulnames(mask, 2));
    
    
    
    resol=t(2)-t(1)
    if fn==1
        motiontot=[];
        for m=1:multip
            if m==1
               Ttot=t.';
            else
               Ttot= [Ttot,t.'+Ttot(end)+resol];
            end
        end
        
    else
        for m=1:multip
            Ttot= [Ttot,t.'+Ttot(end)+resol];
        end
    end
    for m=1:multip
        motiontot=[motiontot;motion6t];
    end
         
end

Best Answer

    mTtot=[]
    size(mTtot)
    
    mTtot =
     []
ans =
     0     0
with it being empty, end as an index would be 0. mTtot(end) would be mTtot(0) which is not permitted.
mTtot= [mTtot ,t.'+mTtot(end)+resol];
Perhaps you are wanting mTtot(end) to be empty instead of an error when mTtot is empty. But if that were the case, then you would have the situation
mTtot = [[], t.'+[]+resol]
and anything + [] is [], so you would be dealing with
 mTtot = [[], []]
which would leave mTtot empy, but I suspect you are trying to append to it in that statement,.
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