Hi,
first of all: you don't need the loop
BigMatrix = b + (1:a);
BigMatrixStr = cellstr(datestr(BigMatrix));
For the last day of a month you have different possibilities. One is to use datevec and note, that the last day of a month is one day before the first of the next month:
% add one day and convert to date vectors:
BigMatrixVec = datevec(BigMatrix+1);
% remove all that are not the first of a month
BigMatrixVec(BigMatrixVec(:,3)~=1, :) = [];
% and subtract that one day again:
BigMatrixStrLast = cellstr(datestr(datenum(BigMatrixVec)-1));
Or use the datetime object that comes with R2014b:
dt = datetime(BigMatrix, 'ConvertFrom', 'datenum');
t = unique(dateshift(dt, 'end', 'month'));
% remove the last month if it's past the last dt
t(t>dt(end)) = [];
Titus
