Hello,
I have a dataframe of say 20 lines with one line per individual. I want to
group these 20 individuals
by length class (eg. of 5cm) and get the mean value of all the other variables
(eg VarA and VarB) for each length class
My dataframe is as follow:
Length <- 10:30
VarA <- seq(1000,1200,10)
VarB <- seq(500,700,10)
Data <- cbind(Length,VarA,VarB)
And I want to get something like:
Length Class Mean VarA Mean VarB
[10-15[ 1020 520
[15-20[ 1070 570
[20-25[ 1120 620
[25-30] 1175 675
Would you have any suggestions how to do that ?
Many thanks.
Sonia.
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