Hi, I have .bed .bim. fam files for various chromosomes of some individuals and I would like merge with other plink files of some other individuals again for each chromosomes I would like to write a loop that does the merging automatically for all the files in just one command line Something like this:

for file in /home/users/chrs/*.{bed,bid,fam};
do plink --bfile filename1.chr$ --bmerge filename2.chr$.bed filename2.chr$.bim filename2.chr$.fam --out filename1_filename2_merged;
done

Here $ means any number from 1 to 22 for each files of the chromosomes.

Any help will be highly appreciated,thanks