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Full Discussion: Extracting rows from a text file based on the first column
Top Forums UNIX for Dummies Questions & Answers Extracting rows from a text file based on the first column Post 302556835 by evelibertine on Monday 19th of September 2011 07:02:56 PM
Old 09-19-2011
Extracting rows from a text file based on the first column
I have a tab delimited text file where the first column can take on three different values : 100, 150, 250. I want to extract all the rows where the first column is 100 and put them into a separate text file and so on. This is what my text file looks like now:

100 rs3794811 0.01 0.3434
100 rs8066551 0.01 0.4541
100 rs7215271 0.02 0.2592
100 rs6565733 0.00 0.8408
150 rs1106175 0.00 0.5562
150 rs8064924 0.00 0.8014
150 rs7224313 0.03 0.1484
150 rs7217319 0.02 0.2413
150 rs4890199 0.02 0.2033
150 rs4890183 0.03 0.1351
250 rs4424950 0.02 0.1715
250 rs7503116 0.03 0.1474
250 rs1136388 0.04 0.0801
250 rs1609550 0.02 0.2784
250 rs11654695 0.01 0.4495
250 rs11649979 0.01 0.4060
250 rs12938802 0.00 0.5404
250 rs1138504 0.01 0.3606

How do I go about doing that? Thanks!
 

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LEARN ABOUT CENTOS

psc

PSC(1)							      General Commands Manual							    PSC(1)

NAME

       psc - prepare sc files

SYNOPSIS

       psc [-fLkrSPv] [-s cell] [-R n] [-C n] [-n n] [-d c]

DESCRIPTION

       Psc  is used to prepare data for input to the spreadsheet calculator sc(1).  It accepts normal ascii data on standard input.  Standard out-
       put is a sc file.  With no options, psc starts the spreadsheet in cell A0.  Strings are right justified.  All data on a line is entered	on
       the  same row; new input lines cause the output row number to increment by one.	The default delimiters are tab and space.  The column for-
       mats are set to one larger than the number of columns required to hold the largest value in the column.

OPTIONS

       -f     Omit column width calculations.  This option is for preparing data to be merged with an existing spreadsheet.  If the option is  not
	      specified, the column widths calculated for the data read by psc will override those already set in the existing spreadsheet.

       -L     Left justify strings.

       -k     Keep  all  delimiters.   This  option  causes the output cell to change on each new delimiter encountered in the input stream.   The
	      default action is to condense multiple delimiters to one, so that the cell only changes once per input data item.

       -r     Output the data by row first then column.  For input consisting of a single column, this option will result in  output  of  one  row
	      with multiple columns instead of a single column spreadsheet.

       -s cell
	      Start  the  top  left  corner  of the spreadsheet in cell.  For example, -s B33 will arrange the output data so that the spreadsheet
	      starts in column B, row 33.

       -R n   Increment by n on each new output row.

       -C n   Increment by n on each new output column.

       -n n   Output n rows before advancing to the next column.  This option is used when the input is  arranged  in  a  single  column  and  the
	      spreadsheet is to have multiple columns, each of which is to be length n.

       -d c   Use the single character c as the delimiter between input fields.

       -P     Plain numbers only.  A field is a number only when there is no imbedded [-+eE].

       -S     All numbers are strings.

       -v     Print the version of psc

SEE ALSO

       sc(1)

AUTHOR

       Robert Bond

PSC 7.16							 19 September 2002							    PSC(1)
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