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Full Discussion: Matching by key fields
Top Forums Shell Programming and Scripting Matching by key fields Post 302282706 by drl on Sunday 1st of February 2009 12:52:03 PM
Old 02-01-2009
Hi, CB.

You might benchmark these approaches to see what is best for your situation,

I would start with the smallest practical set to see what the overhead might be, then perhaps 1, 2, 5, and 10% of the data to see how it is progressing. Many complex solutions tend not to be linear. I think both will be somewhat memory intensive if you have 300K lines in your key.dat file.

Keep us posted ... cheers, drl

PS I used fgrep to avoid any interpretation of special characters in your patterns. The sample you provided used only "|" which is recognized by egrep, but I don't know how representative your sample was.

Last edited by drl; 02-01-2009 at 01:57 PM..
 

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GR_PLOT_CONST(1)						   User Commands						  GR_PLOT_CONST(1)

NAME
gr_plot_const - constellation plot of I&Q data using GNU Radio SYNOPSIS
gr_plot_const: [options] input_filename DESCRIPTION
Takes a GNU Radio complex binary file and displays the I&Q data versus time and the constellation plot (I vs. Q). 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 sam- ple 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_fft.py(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_const 3.5 December 2011 GR_PLOT_CONST(1)
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