# Extract the bigger number of values from the previous one in an array

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Ali Najem on 28 Sep 2022
Commented: Ali Najem on 28 Sep 2022
Dear experts,
I want to do this kind of loop
Data = rand(1,15);
for i=1:15
if Data(i) < Data(i+1)
X =10;
else
X=0;
end
end
X;
I suppose to get 15 values of X between 10 and 0 but I obtained this error
Index exceeds the number of array elements. Index must not exceed 15.
how can i proceed this loop into
Matt J on 28 Sep 2022
I suppose to get 15 values of X between 10 and 0 but I obtained this error
There can't be 15 values, because when i=15, Data(i+1) doesn't exist.

Matt J on 28 Sep 2022
Edited: Matt J on 28 Sep 2022
Easier to do,
Data = rand(1,15)
Data = 1×15
0.5961 0.1403 0.0904 0.4693 0.6848 0.1834 0.0516 0.4032 0.2979 0.5497 0.9613 0.9228 0.9208 0.8610 0.7979
X=10*(diff(Data)>0)
X = 1×14
0 0 10 10 0 0 10 0 10 10 0 0 0 0
Ali Najem on 28 Sep 2022
I apprecaited.

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