MATLAB: Column to multiple row conversion

column to multiple row conversion

Hi,
I wanted to convert a column vector in to multiple rows. The target is i have column of 1 year precipitation data (365,1) and i wonted to convert this in to 12*31 (month by days) matrix including leap years.
Who can can help me with this?
With kind regards,
Tesfalem,

Best Answer

Try
col = rand(366,1); % sample data

mat = col2mat( col, 2020 );
and 
col = rand(365,1); % sample data
mat = col2mat( col );
where
function    mat = col2mat( col, year )
    
    narginchk(1,2)
    if nargin==1
        if numel(col)==365
            year = 2001;    % not a leap year  
        elseif numel(col)==366                          % Fixed error; replaced 365 by 366
            year = 2000;    % a leap year
        else
            error( 'Wrong length of col, %d.', numel(col) )
        end
    end
    
    mat = nan( 31, 12 );        % pad with NaNs
    len = eomday( year, 1:12 );
    
    ix1 = [ 1, cumsum(len(1:11))+1 ];   % first day of month
    ix2 = [ ix1(2:end)-1, sum(len) ];   % last day of month
    
    for jj = 1 : 12
        mat( 1:(ix2(jj)-ix1(jj)+1), jj ) = col(ix1(jj):ix2(jj)); 
    end
end
Related Question