r - How to use unique function with blank/missing values -

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how possible make below data frame rows uniquely depend on second column when there blank/missing values?

> head(interproscan)                 v1        v14 1 sp0000001-mrna-1            2 sp0000001-mrna-1            3 sp0000001-mrna-1            4 sp0000005-mrna-1 go:0003723 5 sp0000006-mrna-1 go:0016021 6 sp0000006-mrna-1 go:0016021   > head(unique(interproscan[ , 1:2] ))                  v1                              v14 1  sp0000001-mrna-1                                  4  sp0000005-mrna-1                       go:0003723 5  sp0000006-mrna-1                       go:0016021 7  sp0000006-mrna-2                       go:0016021 9  sp0000006-mrna-3                       go:0016021

the aim be:

                 v1                              v14 1  sp0000001-mrna-1                                  4  sp0000005-mrna-1                       go:0003723 5  sp0000006-mrna-1                       go:0016021

thank in advance

try data frame or data table:

interproscan <- data.frame(interproscan)  unique(interproscan)

output:

                v1        v14 1 sp0000001-mrna-1            4 sp0000005-mrna-1 go:0003723 5 sp0000006-mrna-1 go:0016021

sample data:

require(data.table) interproscan <- fread("v1,               v14                        sp0000001-mrna-1,                                   sp0000001-mrna-1,                                  sp0000001-mrna-1,                                    sp0000005-mrna-1, go:0003723                        sp0000006-mrna-1, go:0016021                        sp0000006-mrna-1, go:0016021")

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