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Full Discussion: config file, get field.
Top Forums Shell Programming and Scripting config file, get field. Post 302369437 by jimmy_y on Sunday 8th of November 2009 11:39:06 AM
Old 11-08-2009
config file, get field.

Hi Everyone,
I have a txt file: a.txt
Code:
a_b_ 3
c_d_e_ 55

(Assume this a.txt got 100 lines, here i just list 2 lines)
How should i get the 2nd field when 1st field eq c_d_e_. my way is:
Code:
`cat a.txt | grep c_d_e_ | cut -f2 -d' '`

Is there simple way, more efficient way in regular expression, perl? awk? and etc. Smilie
Thanks
 

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MPI_KMEANS(1)						      General Commands Manual						     MPI_KMEANS(1)

NAME
mpi_kmeans - K-Means clustering tool SYNOPSIS
mpi_kmeans [options] DESCRIPTION
mpi_kmeans is a program that uses k-means clustering to produce a list of cluster centers. The resulting data can be used by mpi_assign(1) to assign points to those cluster centers. OPTIONS
A summary of options is included below. Generic Options: --help Produce help message Input/Output Options: --data file Training file, one datum per line (default: "data.txt") --output file Output file, one cluster center per line (default: "output.txt") K-Means Options: --k num Number of clusters to generate (default: 100) --restarts num Number of k-means restarts (default: 0 = single run) --maxiter num Maximum number of k-means iterations (default: 0 = infinity) EXAMPLES
mpi_kmeans --k 2 --data example.txt --output clusters.txt SEE ALSO
mpi_assign(1) AUTHOR
mpi_kmeans was written by Peter Gehler <peter.gehler@tuebingen.mpg.de>. This manual page was written by Christian Kastner <debian@kvr.at>, for the Debian project (and may be used by others). April 11, 2011 MPI_KMEANS(1)
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