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Full Discussion: Transpose an entire text file
Top Forums Shell Programming and Scripting Transpose an entire text file Post 302357601 by radoulov on Wednesday 30th of September 2009 08:45:00 AM
Old 09-30-2009
Quote:
Originally Posted by danmero
Smilie What about this one?
Code:
awk '{for(x=0;++x<=NF;)a[x]=a[x]?a[x]$x:$x}END{for(y=0;++y<=NF;)print a[y]}' FS= file

The problem is that the null string as FS separator is treated differently in older AWK implementations.

From Effective GAWK Programming:

Quote:
There are times when you may want to examine each character of a record separately.
This can be done in gawk by simply assigning the null string ("") to FS. In
this case, each individual character in the record becomes a separate field.[...]
Traditionally, the behavior of FS equal to "" was not defined. In this case, most
versions of Unix awk simply treat the entire record as only having one field. (d.c.)
In compatibility mode (see the section “Command-Line Options” in Chapter 11), if
FS is the null string, then gawk also behaves this way
I mean:

Code:
zsh-4.3.10[t]% print abc | gawk '{while (++i<=NF) print "$"i, "is:", $i}' FS=
$1 is: a
$2 is: b
$3 is: c
zsh-4.3.10[t]% print abc | gawk --posix '{while (++i<=NF) print "$"i, "is:", $i}' FS=
$1 is: abc



---------- Post updated at 02:45 PM ---------- Previous update was at 02:43 PM ----------
Quote:
Originally Posted by ahmad.diab
[...]
but my question is how I can set the FS variable to null FS="" using solaries 10??
You already did it, but it has a different meaning for your AWK implementation.
And of course, you can install gawk on Solaris Smilie.
 

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LEARN ABOUT PLAN9

transpose

TRANSPOSE(9.1)															    TRANSPOSE(9.1)

NAME

       rotate, transpose - re-orient an image

SYNOPSIS

       fb/rotate angle [ input ]

       fb/transpose [ -vhadrlui ] [ -ox y ] [ input ]

DESCRIPTION

       Rotate  rotates the image in its input picture file (default standard input) clockwise by angle degrees, writing the resulting picture file
       on standard output.

       Transpose turns its input picture file on its side by reflection through its major (descending from left to right)  diagonal,  writing  the
       resulting  picture file on standard output.  If no file name is given, the picture is read from standard input.	Options yield all possible
       symmetries of the square grid:

       -d     reflects the image through its descending diagonal (the default).

       -a     reflects the image through its ascending diagonal.

       -v     reflects the image left-to-right through its vertical center line.

       -h     inverts the image top-to-bottom through its horizontal center line.

       -r     rotates the image to the right (clockwise) 90 degrees.

       -l     rotates the image to the left (counterclockwise) 90 degrees.

       -u     rotates the image upside down (180 degrees).

       -i     identity transformation (for completeness only.)

       -o x y translates by (x,y).  Without -o, the input and output files have the same upper-left corner.

       Transpose is particularly useful to convince programs that work on the rows of a picture file to operate on columns.  For example

	      fb/transpose big |
		   fb/resample 48 |
		   fb/transpose |
		   fb/resample 48 >tiny

       makes a tiny 48x48 version of a big picture.

SOURCE

       /sys/src/fb/rotate.c
       /sys/src/fb/transpose.c

SEE ALSO

       picfile(9.6), resample(9.1)

BUGS

       Very large images may not fit in memory.  The result of rotate is not anti-aliased.

																    TRANSPOSE(9.1)
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