MATLAB: Calculate the accumulation of a variable over time within a loop

fieldmeanloopsummation

Hello,

I have evaporation as daily values (m). I have calculated the weighted fieldmean, which gives me a vector with length = no. of days. However, I would like to display these values as monthly sums.

How can I do this in a loop?

For example:

newsum(1) = nansum(data(1:30)) and so forth…

Best Answer

Once you get the month data, the code will be almost identical to this answer:

http://www.mathworks.com/matlabcentral/answers/155115#answer_151972

Instead of @std, you'll want to pass in @sum

Related Solutions

MATLAB: Monts in year sequence, string, matrix

Convert to a timeseries() object and use retime()

Or:

Data = rand(365,1);
Data_timestamp = datetime(2021, 1, 1:365).';  %use non-leap year !
month_totals = accumarray(month(Data_timestamp), Data)
month_totals = 12×1
   17.6917
   12.5502
   14.1349
   17.2993
   14.2127
   17.4742
   16.3479
   14.0845
   13.4153
   15.4119

MATLAB: How to convert a cell array of “random dates in the year” into time in year

One possibility:

datestrs = {'1993-4-1'; '1993-4-28'};                               % Date String Cell Array
dnvct = datenum(datestrs, 'yyyy-mm-dd');                            % Convert To Date Numbers
dateyr = str2num(datestrs{1}(1:4));                                 % Get Year (Numeric)
range_yr_dn = datenum([dateyr 1 1 0 0 0; dateyr 12 31 23 59 59]);   % Start, End Of Year
range_yr_dn_diff = diff(range_yr_dn);                               % Year Range
year_fraction = (dnvct - range_yr_dn(1))./range_yr_dn_diff;         % Year Fraction For Each Input Date
Result = [repmat(dateyr, size(year_fraction,1), 1) + year_fraction] % Year Fraction In Desired Format
Result =
         1993.2
         1993.3

Best Answer

Related Solutions

MATLAB: Monts in year sequence, string, matrix

MATLAB: How to convert a cell array of “random dates in the year” into time in year

Related Question