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Full Discussion: Columns to Rows - Transpose - Special Condition
Top Forums Shell Programming and Scripting Columns to Rows - Transpose - Special Condition Post 302873897 by jacobs.smith on Wednesday 13th of November 2013 11:55:24 AM
Old 11-13-2013
Columns to Rows - Transpose - Special Condition
Hi Friends,

Hope all is well.

I have an input file like this

Code:
a gene1 10
b gene1 2
c gene2 20
c gene3 10
d gene4 5
e gene5 6

Steps to reach output.

1. Print unique values of column1 as column of the matrix, which will be

Code:
a
b
c
d
e



2. Print unique values of column2 as row of the matrix, which will be

Code:
gene1 gene2 gene3 gene4 gene5

3. Now print column3 values in the matrix, which will be my final output

Code:
     gene1 gene2 gene3 gene4 gene5
a   10      0        0       0        0
b   2        0        0       0        0
c   0        20      10      0        0
d   0        0        0       5        0
e   0        0        0       0        6

My special condition is nothing but, if there is no value for a combination, print that value to be 0. My input file has more than 50K records. Please let me know if you have any questions. Thanks in advance.

The spacing is messed up while posting this thread. But, my output columns are separated by a tab.
 

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LEARN ABOUT V7

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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