R-newbie question
I have 2 matrices
(a) P1 has only one column of 32K rows
(b) PC has 2 column {P, C} of 3200 rows
Every values in P1 matches with a value in PC[,p] (column p). I would like
to use Which to search for all value in P1 that matchex PC[,p] and get the
PC[,c]. However because P1 and PC does not have the same number of rows, I
got lots of 'NA'. Thanks for your help.
Example..
P1 <- {'p001', 'p001', 'p002', 'p010'..}
PC <- { c('p001','class a'), c('p002', 'class b'),.. , c('p010', 'class
10')}
Result <- {c('p001', 'class a'), c('p001', 'class a'), c ('p002', 'class
b'), c('p010', 'class 10')...}
My D. Coyne
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