How to fix error index exceeds matrix dimensions. I am very new to matlab and am trying to write a loop for this data set but I keep getting this error. Any help would be appreciated!

for i=1:length(Data);
   for j=1:3
    if Data(i,j)<=0
       Data(i,:)=[];
    end
   end
end

[Stephen23]

This is MATLAB, so get rid of the ugly loop entirely and write simpler code:

>> Data = randi(9,6,3)-2
Data =
   6   6   1
   0   3   5
   0   6   2
  -1   4  -1
   7   4   7
   0   4   6
>> Data(any(Data<=0,2),:) = []
Data =
   6   6   1
   7   4   7

Answer 1

[Dennis]

You remove rows of Data, thus its size is shrinking during your loop. One way to resolve this is removing those rows after your loop:

idx=[];
for i=1:size(Data,1)
    if any(Data(i,:)<=0)
        idx=[idx,i];
    end
end
Data(idx,:)=[];

[Joshua Randle]

Thank you so much you are a lifesaver!

[Stephen23]

https://www.mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html