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tp4659063p4659064
2013 Feb 19
3
Quantiles of a subset of data
bradleyd wrote
> Excuse the request from an R novice! I have a data frame (DATA) that has
> two numeric columns (YEAR and DAY) and 4000 rows. For each YEAR I need to
> determine the 10% and 90% quantiles of DAY. I'm sure this is easy enough,
> but I am a new to this.
>
>> quantile(DATA$DAY,c(0.1,0.9))
> 10% 90%
> 12 29
>
> But this is for the entire