MATLAB: How to write a loop for this purpose

cellevalfor looplooploops

Hey all,

I have a 34*1 cell (let's call it precips). I would like to have a loop in order to do this:

1982 = precips {1, 1};

1983= precips {2, 1};

1984= precips {3, 1};

1985= precips {4, 1};

2015= precips {34, 1};

what is the code for the loop?

Best Answer

for iter = 1 : size(precips,1)
    year = 1981 + iter;
    cmd = sprintf('%d = precips{%d,1}', year, iter);
    eval(cmd);
end

Related Solutions

MATLAB: How to summarize this code

You can try to create structure for the data of different years:

for i = 1:length(precips)
    precip.(['y',num2str(i+1981)]) = precips{i,1};
end

Now, if you want to access data with any specific year say 2000. You can just type:

Req_data = precip.y2000;

I hope it helps!

MATLAB: How to write a LOOP for this case

So again, numbered variables and field names are a bad idea. (see here and here) for the related questions). The whole thing would be simpler if the original cell array was used.

If the original cell array had been kept, the code over the 3 questions could be simplified to:

%using original cell array precips
precip_monthly = cell(size(precips));  %preallocate result cell array
for idx = 1:numel(precips)
    if size(precips{idx}, 3) == 365
        month_lengths=[31 28 31 30 31 30 31 31 30 31 30 31];%non-leap year
    else
        month_lengths=[31 29 31 30 31 30 31 31 30 31 30 31];%leap year
    end
    p_month =mat2cell(precips{idx}, size(precips{idx}, 1), size(precips{idx}, 2), month_lengths);%divide into 1 cell per month
    p_month = cellfun(@(x) sum(x, 3, 'omitnan'), p_month, 'UniformOutput', false); %find mean for each month !!THIS CALCULATE THE SUM!!
    precip_monthly{idx} = cell2mat(p_month);%convert back to 3D array
end

Note that you have written a comment that says find mean for each month but you use the sum function. So either the code or the comment is wrong.

Best Answer

Related Solutions

MATLAB: How to summarize this code

MATLAB: How to write a LOOP for this case

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