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Way to read data a-la plot without plotting?

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Is there a way to get gnuplot to examine a datafile and assign a value to a variable?

A convoluted way using a plot statement is to use

plot 'file' every 1:1:line_no:block_no:line_no:block_no using ($col_no = time)

for example, which allows a block, line, and column number to be specified and assigned to the variable time.  However, I'd like to be able to do this without invoking a plot statement.
Any suggestions?

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Way to read data a-la plot without plotting? Kevin <kevin.nielson@gmail.com> - 2011-05-04 13:11 -0700

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