[R] Calculating percentiles for multiple dates

[Rui Barradas]

Hello,

Sorry for my earlier post, they show the problem of not providing 
context. Fortunatelly, arun's post made me realize there was some data 
posted somwhere after all. So, try this:

aggregate(DEPTH ~ LOG_DATE, data = dat1, quantile, probs = c(0.025, 0.975))
   LOG_DATE DEPTH.2.5% DEPTH.97.5%
1    37757   0.635225    5.042800
2    37758   0.299250    2.870000


Hope this helps,

Rui Barradas

Em 30-07-2012 17:35, guzzom escreveu:
> I was hoping to calculate the percentile for each date. So group all of one
> date together, calculating the value of the 2.5 and 97.5 percentile.
>
>
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