Extracting points within an array

I want to find data within an Array, A, that has length less than 120. There are 58 time series saved in A each with different lengths.

for i=1:58

Tg2=SSH_metres(:,A(i));

c=find(~isnan(Tg2));

short(i)=length(c)<120;

end

I have tried this, but this gives an array, short, that is either 1 or 0. Instead, I want the position within A that the value corresponds to. Is there any way of doing this?

[Dyuman Joshi]

Assuming you want the indices for which values of short are 1

out = find(short)
%You can also do this via vectorization
Tg2=SSH_metres(:,A);
c=find(sum(~isnan(Tg2))<120);

If that is not what you want to obtain, please specify more.

Answer 1

[Divyanshu]

As per the description provided, you want to access the indexes of the elements which are not ‘NaN’ from within each of the 58 time series columns of the 2-D array ‘A’. You can have a look at the below demo script and can try understanding it.

A = [1 2 3 4; NaN 2 3 5;NaN NaN 3 6;4 2 4 1];
for i=1:4
    col=A(:,i)';
    logArray = ~isnan(col);
    ind = find(~isnan(col));
    length = nnz(logArray);
    if length<4
%         here you can do the needful operations with 'ind' as it holds the 
%         list of row numbers for the corresponding column i where the data
%         is not 'nan'
    end
end