On 11/18/2010 05:39 PM, sc wrote:
# sum last word
{ total += $NF }
END { print total }
that sums the last word of each line (if it's numeric), how
can i feed it a range of lines and read the sum in after the
end? reading the help it appeared i could enter
:5,9r!awk -f ~/sumlw.awk
to read in the sum, but this hangs and i have to ctrl-c it to
regain control
The hang is awk waiting for input on stdin, but not receiving any
from you (the user, not vim). So an EOF will also close awk but
it will have processed whatever data you *typed* (likely nothing).
I don't know if your trailing data is integer or floating-point,
but you have a couple options. My first thought is to use Vim's
filter command ":!" and tweak your script so that the script
regurgitates your input and then appends the total:
=============sumlw.awk========
{ total += $NF ; print $0 ; }
END { print total ; }
==============================
and then in vim issue
:5,9!awk -f sumlw.awk
If your data contains integers (instead of decimal numbers), you
can do it purely in vim:
:let total=0 | 5,9g/[-+]\=\d\+$/let total +=
matchstr(getline('.'), '[-+]\=\d\+$')
:put=total
If you have a more current version of vim that supports
floating-point numbers, you can tweak the regexp from
[-+]\=\d\+
to something like
[-+]\=\d\+\%(\.\d\+\)
to capture stuff after a decimal point (additional work would be
needed for scientific notation), and then you can use whatever
constructs a float (I'm only running 7.1 here, and I think floats
were added after that) wrapped around the matchstr() call.
-tim
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