compare two datasets of unequal length and create a textfile

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Res
Res 2013-4-22
Hi I have two data sets (for two locations) containing following information:
Year Month Day Precipitation
One of the sets has 80 rows, the other 102
I should create a textfile which shows all the dates which occure in both data sets, hence I want a list of dates on which it rained on both locations. And I just don't know how to do that.
Thank you for your help

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Matt Kindig
Matt Kindig 2013-4-22
To read in the text files:
doc dlmread
To compare which dates occur in both files:
doc intersect
(The second output of intersect (i.e., the indices) may be helpful as well.

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