I have a data frame like shown below
sample1 sample2 sample3 sample4 sample5 a P P I P P b P A P P A c P P P
P P d P P P P P e M P M A P f P P P P P g P P P A P h P P P P P
I want to keep only those rows which have all "P" across all the columns.
Since the matrix is large (about 20,000 rows), I cannot do it in excel
Any special function that i can use?
--
*Chirag Gupta*
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