Re: [R] Counting variables repeted in dataframe columns to create a presence-absence table

Hi, Try: data_m <- read.table(text="Abortusovis07918 Agona08561 Anatum08125 Arizonae65S Braenderup08488 1  S5305B_IGR S5305B_IGR  S5305B_IGR  S5305B_IGR S5305B_IGR 2  S5305A_IGR S5300A_IGR  S5305A_IGR  S5300A_IGR S5300A_IGR 3  S5300A_IGR S5300B_IGR  S5300A_IGR  S5300B_IGR S5300B_IGR 4 

[R] Counting variables repeted in dataframe columns to create a presence-absence table

Hi! I'm new in R and I'm writing you asking for some guidance. I had analyzed a comparative genomic microarray data of /56 Salmonella/ strains to identify absent genes in each of the serovars, and finally I got a matrix that looks like that: > data[1:5,1:5] Abortusovis07918 Agona08561 Anat