02-11-2009
how to fix this awk script?
i have a log file while looks like this
++
user_a blabla
blabla nas_b blabla user_d
this is a user_a
junk line
another junk line
user_c nas_m blabla
++
basically most of the lines contain a "user" keywords, and the rest of the lines do not have "user" at all.
So I have the following script, which just extracts the user part(if that line has a user keyword) from each line
awk '{ for (i=0; i<=NF; i++)
if($i~/user/)
{a=$i}
else
{continue}
{print a}
}' /tmp/test
and when I run it, I got the following result
user_a
user_d
user_a
user_a #<===actually there is no user in that line at all.
user_c
why this happens and how can I fix my script? thanks
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LEARN ABOUT DEBIAN
gr_plot_float
GR_PLOT_FLOAT(1) User Commands GR_PLOT_FLOAT(1)
NAME
gr_plot_float - plot floating point binary date using GNU Radio
SYNOPSIS
gr_plot_float: [options] input_filenames
DESCRIPTION
Takes a GNU Radio floating point binary file and displays the samples versus time. You can set the block size to specify how many points to
read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted
versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the
samples.
OPTIONS
-h, --help
show this help message and exit
-B BLOCK, --block=BLOCK
Specify the block size [default=1000]
-s START, --start=START
Specify where to start in the file [default=0]
-R SAMPLE_RATE, --sample-rate=SAMPLE_RATE
Set the sampler rate of the data [default=1.0]
SEE ALSO
gr_plot_char(1) gr_plot_const(1) gr_plot_fft_c(1) gr_plot_fft_f(1) gr_plot_float(1) gr_plot_int(1) gr_plot_iq(1) gr_plot_psd_c(1)
gr_plot_psd_f(1) gr_plot_qt(1) gr_plot_short(1)
gr_plot_float 3.5 December 2011 GR_PLOT_FLOAT(1)