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Top Forums UNIX for Beginners Questions & Answers Storing file contents to a variable Post 302970975 by am24 on Thursday 14th of April 2016 09:07:18 AM
Old 04-14-2016
Hi Ravinder,

Thanks for your reply. I have tried it using
Code:
while

loop as below but did not get the result.

Code:
     while IFS = read -r line
      do
      echo "$line"
      done < "$file"

My input file looks like below. I am giving a few lines of it. Original file contains 210 lines.

Code:
may16 500 30.148 69.852 32.871 35.413 19.372 12.345  0.296  0.000 18.440  0.557  0.051 42.266  9.246  0.000 13.865  0.030 15.248 67.067 32.933 13.212 86.788  7.987 92.013  0.000100.000 37.578 62.422
may16 501  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000
may16 502 30.808 69.192 27.597 33.934 20.517 17.952  0.225  0.000 20.105  0.773  0.000 41.955 10.439  0.000 14.266  0.053 12.185 63.017 36.983 13.513 86.487  8.937 91.063  0.073 99.927 41.422 58.578
may16 503 23.417 76.583 18.366 31.827 24.033 25.774  1.421  0.171 15.536  0.448  0.115 23.530 24.581  0.000 19.726  0.058 14.414 60.157 39.843 21.544 78.456 19.704 80.296  0.145 99.855 47.799 52.201
may16 504  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000  0.000

After storing the file contents to a variable , I want to use grep command to remove some of the records in field 2 and then i want to append some other file to the resulting file.

When i am asking the user to enter the file manually and read the file with the
Code:
read

command, i am able to do it but when i am trying the script to read itself,can not able to do.

Please let me know your thoughts on this.

Thanks in advance.

---------- Post updated at 08:07 AM ---------- Previous update was at 08:02 AM ----------

One more thing i would like you to know that i did not try using awk or sed as i do not know how to use them for this purpose.

Can you please share it by giving one example ?

Thanks in Advance.
 

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funtbl(1)							SAORD Documentation							 funtbl(1)

NAME
funtbl - extract a table from Funtools ASCII output SYNOPSIS
funtable [-c cols] [-h] [-n table] [-p prog] [-s sep] <iname> DESCRIPTION
[NB: This program has been deprecated in favor of the ASCII text processing support in funtools. You can now perform fundisp on funtools ASCII output files (specifying the table using bracket notation) to extract tables and columns.] The funtbl script extracts a specified table (without the header and comments) from a funtools ASCII output file and writes the result to the standard output. The first non-switch argument is the ASCII input file name (i.e. the saved output from funcnts, fundisp, funhist, etc.). If no filename is specified, stdin is read. The -n switch specifies which table (starting from 1) to extract. The default is to extract the first table. The -c switch is a space-delimited list of column numbers to output, e.g. -c "1 3 5" will extract the first three odd-numbered columns. The default is to extract all columns. The -s switch specifies the separator string to put between columns. The default is a single space. The -h switch specifies that column names should be added in a header line before the data is output. With- out the switch, no header is prepended. The -p program switch allows you to specify an awk-like program to run instead of the default (which is host-specific and is determined at build time). The -T switch will output the data in rdb format (i.e., with a 2-row header of column names and dashes, and with data columns separated by tabs). The -help switch will print out a message describing program usage. For example, consider the output from the following funcnts command: [sh] funcnts -sr snr.ev "ann 512 512 0 9 n=3" # source # data file: /proj/rd/data/snr.ev # arcsec/pixel: 8 # background # constant value: 0.000000 # column units # area: arcsec**2 # surf_bri: cnts/arcsec**2 # surf_err: cnts/arcsec**2 # summed background-subtracted results upto net_counts error background berror area surf_bri surf_err ---- ------------ --------- ------------ --------- --------- --------- --------- 1 147.000 12.124 0.000 0.000 1600.00 0.092 0.008 2 625.000 25.000 0.000 0.000 6976.00 0.090 0.004 3 1442.000 37.974 0.000 0.000 15936.00 0.090 0.002 # background-subtracted results reg net_counts error background berror area surf_bri surf_err ---- ------------ --------- ------------ --------- --------- --------- --------- 1 147.000 12.124 0.000 0.000 1600.00 0.092 0.008 2 478.000 21.863 0.000 0.000 5376.00 0.089 0.004 3 817.000 28.583 0.000 0.000 8960.00 0.091 0.003 # the following source and background components were used: source_region(s) ---------------- ann 512 512 0 9 n=3 reg counts pixels sumcnts sumpix ---- ------------ --------- ------------ --------- 1 147.000 25 147.000 25 2 478.000 84 625.000 109 3 817.000 140 1442.000 249 There are four tables in this output. To extract the last one, you can execute: [sh] funcnts -s snr.ev "ann 512 512 0 9 n=3" | funtbl -n 4 1 147.000 25 147.000 25 2 478.000 84 625.000 109 3 817.000 140 1442.000 249 Note that the output has been re-formatted so that only a single space separates each column, with no extraneous header or comment informa- tion. To extract only columns 1,2, and 4 from the last example (but with a header prepended and tabs between columns), you can execute: [sh] funcnts -s snr.ev "ann 512 512 0 9 n=3" | funtbl -c "1 2 4" -h -n 4 -s " " #reg counts sumcnts 1 147.000 147.000 2 478.000 625.000 3 817.000 1442.000 Of course, if the output has previously been saved in a file named foo.out, the same result can be obtained by executing: [sh] funtbl -c "1 2 4" -h -n 4 -s " " foo.out #reg counts sumcnts 1 147.000 147.000 2 478.000 625.000 3 817.000 1442.000 SEE ALSO
See funtools(7) for a list of Funtools help pages version 1.4.2 January 2, 2008 funtbl(1)
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