[R] Query about using rowSums/ColSums on table results

From: lalitha viswanath <lalithaviswanath_at_yahoo.com>
Date: Mon, 30 Apr 2007 09:10:24 -0700 (PDT)

I have data of the form
class age

A      0.5
B      0.4
A      0.56666
C      0.785
D      0.535
A      0.005
C      0.015
D      0.205
A      0.605

etc etc...

I tabulated the above
tab <-table(data$class, cut(data$age, seq(0,0.6,0.02))

I wish to view the results in individual bins as a percentage of the points in each bin.
So I tried

However that is yielding Inf as a return value in places where clearly the result should be a non-zero value.

Is there an alternate way to get the results in each bin as percentages of the total points in that age-bin?


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