[R] importing and filtering time series data

[Joel Reymont]

Folks,

I'm new to R and would like to use it to analyze web server performance data. 

I collect the data in this CSV format:

1304083104.41,Y,668.856249809
1304083104.41,Y,348.143193007

First column is a <seconds.microseconds> timestamp, rows with N instead of Y need to be skipped and the last column has the same format as the first column, except it's request duration (latency).

I would like to calculate average number of requests per second, mean latency, variance, 5 and 95 percentiles.

What is the best way to accomplish this, starting with importing of time series?

	Thanks, Joel

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