MATLAB: Open and read monthly dataseries with the filename ‘yyyymmdd’

filename with datemonthly for loop

How do I make my a variable count only months instead of each day?
StartDate1 = num2str(StartDate); %date to string
StartDate2=datenum(StartDate1,'yyyymmdd'); %date to serial date number
EndDate1 = num2str(EndDate);
EndDate2=datenum(EndDate1,'yyyymmdd');
Dates=[StartDate2:EndDate2];
startvecs = datevec(StartDate2);
endvecs = datevec(EndDate2);
diffvecs = endvecs - startvecs;
countmonths = 12*diffvecs(:,1) + diffvecs(:,2)+1;
NumOfDates=max(size(Dates));
day = 1;
day = num2str(day);
day=strcat('0',day);
for i = 1:countmonths %looping through months
    Date = datestr(Dates(i),'yyyymm');
    year = Date(1:4);
    month = Date(5:6);
        filename = strcat(ProcessingPath,'3B43.',year,month,day,'.7A.HDF');
.....

Best Answer

Try this is code:
StartDate = 20100502;
EndDate = 20160201;
v = datevec([sprintf('%d',StartDate);sprintf('%d',EndDate)],'yyyymmdd');
[y,m,d] =datevec(datenum(v(1,1),v(1,2)+(0:diff(v(:,1:2))*[12;1])',1));
out = [y,m,d];
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