[R] Inserting percentile values in a data frame

[ramoss]

Hello

I need to calculate and insert the values for the 50,75,90,95 & 99
percentiles in a data frame for each row.

I used agr1$quantile <- quantile(agr1$cnt, probs=c(.50, .75, .90, .95, .99))
but that didn't work.
How can calculate the percentile for my variable "cnt"  , insert & name the
percentile as p50, p75, etc 
in my data frame agr1?


Thanks in advance for your thoughts/suggestions.



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