please do # The following script does the same as the previous one # except that it will write results for phi and psi in a file # this shows how to do string concatenation, and conversion # from floating point values to string. # Then it will open the resulting file so that you see what has been done. open pdb from "net" "1CRN"; $MYFILENAME = "results"; $MYFILE = open file $MYFILENAME in usrstuff for writing; $X = 0; $NBGROUPS = groupcount of "1crn"; do { $SEL = select in "1crn" pos $X; $PHI = phi($SEL); $PSI = psi($SEL); print on $MYFILE "phi = " + (string)$PHI + " psi = " + (string)$PSI; } while (++$X < $NBGROUPS); close file $MYFILE; open text $MYFILENAME in usrstuff; thank you