[R] hist function in a for loop

[Dzu]

Dear all,

I need to create a for-loop in which I can compute multiple histograms
My code is the following :
#singlefile includes huge csv file
#I want to specify the binsize
#I would like to compute in the for -loop the histograms


    numfiles <- length(singlefile)
    for (i in 1 :51)
    { 
    binsize <- -20 :20/2
    hist(singlefile(singlefile$GVC[singlefile$new_id==i]], break=seq(), by =
binsize)))

What do I have to do ?
How can I specify the range for i  ?

I am totally lost
Thanks for support
D.U



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