Dear all,

I want to use fortran(77 or 90) subroutine from numerical recipe to do a sorting(actually I want to use sorting to find the value of the 50000-th largest number in my array). My array size=1024*1024*1024. I ever tried "select", but the result is not correct. Could you please give me any suggestion which subroutine is good for this big array?

Any of your kind help will be highly appreciated.