On 9/14/06, O. Hartmann <[EMAIL PROTECTED]> wrote: [snip]
To keep a small shell script portable I use awk for separating an ASCII file from a home brewn scientific model software. The datasets of the output is enclosed by/begin_data_set_##/ . . . /end_data_set_##/ ## is a two-digit counter, but not necessesaryly equidistant. I would like to separate the file contaning all datasets via awk or sed into appropriate files - this is my intention, but I failed. the simplest way - in theory and in my limitit ability of using sed or awk - is to print all lines between the (sed/awk) addresses /begin_data_set_##/ ... /end_data_set_##/ but this does not work due to i cannot use variables in the address range specifiers neither in awk nor in sed like this: awk -v nc=$NUMBER '/\/begin_data_set_nc\//,/\/end_data_set_nc\// { do-something-in-awk}' $input_file > $output_file_$NUMBER nc in this example is set to the counter of the desired dataset. I would like to use SED or AWK only due to portability reasons.
[snip] You have to prefix the variable with "$" and use double quotes instead of single quotes. The shell will expand a variable within double quotes, but one within single quotes $ cat data /start_1/ This is dataset 1 /end_1/ /start_2/ This is dataset 2 /end_2/ /start_3/ This is dataset 3 /end_3/ $ cat sed_extract NR=$1 sed -ne "/\/start_$NR\//,/\/end_$NR\//p" data $ sh -vx sed_extract 3 NR=$1 + NR=3 sed -ne "/\/start_$NR\//,/\/end_$NR\//p" data + sed -ne /\/start_3\//,/\/end_3\//p data /start_3/ This is dataset 3 /end_3/ $ sh -vx sed_extract 2 NR=$1 + NR=2 sed -ne "/\/start_$NR\//,/\/end_$NR\//p" data + sed -ne /\/start_2\//,/\/end_2\//p data /start_2/ This is dataset 2 /end_2/ You were close ;) _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
