[R] Summary of data for each year

[Pascal Oettli]

Hello,

One possibility is:

 > creek <- read.csv("creek.csv")
 > colnames(creek) <- c("date","flow")
 > creek$date <- as.Date(creek$date, "%m/%d/%Y")
 > creek <- within(creek, year <- format(date, '%Y'))

 > with(creek, aggregate(flow, by=list(year=year), summary))

HTH,
Pascal


Le 01/02/2013 16:32, Janesh Devkota a écrit :
> Hello All,
>
> I have a data with two columns. In one column it is date and in another
> column it is flow data.
>
> I was able to read the data as date and flow data. I used the following
> code:
>
> creek <- read.csv("creek.csv")
> library(ggplot2)
> creek[1:10,]
> colnames(creek) <- c("date","flow")
> creek$date <- as.Date(creek$date, "%m/%d/%Y")
>
> The link to my data is https://www.dropbox.com/s/eqpena3nk82x67e/creek.csv
>
> Now, I want to find the summary of each year. I want to especially know
> mean, median, maximum etc.
>
> Thanks.
>
> Janesh
>
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