On 3/17/2017 12:58 PM, Ulrik Stervbo wrote:
> Hi Evan
>
> you can easily do this by applying diff() to each exp group.
>
> Either using dplyr:
> library(dplyr)
> mydata %>%
> group_by(exp) %>%
> summarise(difference = diff(rslt))
>
> Or with base R
> aggregate(mydata, by = list(group = mydata$exp), FUN = diff)
>
>
Indeed -- thanks very much!
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