Subgrouping Quantiles for 9 traits to form a dataframe showing individuals falling in range of quantiles (0-0.25,0.25-0.50...) for all the traits

Question

I made quantiles for 9 traits separately from a datafile rr , ex.

q1 <- quantile(rr$PHemmean,prob=seq(0,1,by=0.2))
q2 <- quantile(rr$ELemmean,prob=seq(0,1,by=0.2))

how to subgroup individuals in those 4 subgroups from 0.0-0.25, 0.25 - 0.50, 0.5-0.75., may be by which and </<= function to form a dataframe with columns ex.(PHemmeanQ) including all quantiles, it may look like this:

PHemmeanQ.... ELemmeanQ

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4

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