In a time series ts object, like the z1.ts below:

z1 = array(1:235)

z1.ts = ts(z1, frequency =12)

I would like to select only a certain month, for instance the "February" 
data

If I transform the data to a matrix, I have the problem that 235 is not 
a multiple of 12

I do not like to cut or add data, or program a loop to pick out the 
correct data.

I am wondering if exist an easier way to select month data in a ts object.

Thank you a lot for your help.

SGeco


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