Select data from a date range

I would like to select data from a date range using month end. I have a bunch of month end dates in datetime and numeric values for each of those. I want to be able to extract the values by inputting a date range. For example, return all numeric values for 1/31/2012 to 12/31/15. Then I would take the standard deviation of that 3 year history.

[Azzi Abdelmalek]

Can you post a sample of your data?

Answer 1

[Azzi Abdelmalek]

d=datenum('1/31/2010'):datenum('12/31/15') % Example
data=randi(9,numel(d),1)'
d1=datenum('1/31/2012')
d2=datenum('12/31/2015')
idx=d>d1& d<d2
out=[d(idx); data(idx)]'

[Harry Lindner]

Hi, Thank you for the reply. I only have month end values, so this index exceeds the matrix dimensions.

I attached a sample file to the original question.