Clash Royale CLAN TAG

Make a list of values that belong to each region

I have a little trouble in R. I'm pretty new R users.

So I have a dataframe which looks like that (but much more longer) :

My first problem is that my file have no header, I upload my file with this command :

My_data=read.table("/home/toto/test.bed",sep="t", dec=".",fill=TRUE,header = FALSE)


And after try to make a header like that

names(My_data)=c("chr", "start","end","Region_type","Region_id")


But when I want to take a column

My_column<-My_data$Region_type


It does not work. So I must to do like that :

My_column<-My_data[,4]


But I don't understand why the header doesn't work...

My second problem is that I'm trying to make a list of all the clones (clone is represented by chrX Start-End) that belong to each region (MACS_peak_xxx).

To do this I tried something like that :

region_list <- levels(My_data[,4])

region_list_clones <- lapply(region_list, function(x) which( My_data[,4] == x))


I'm pretty sure that's it's very easy to do...

Thank you for your help, I hope that's my example is clear :)

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