11-18-2016
Looks like I've misread/misinterpreted your specification. Sorry for that.
So, in your picture, we're seeing many empty fields (e.g. 15 after the first), 81 fields make up a record of unpredictable length, and there's no <NL> (\n, ^J, 0x0A) char in it.
Are other non-printable, control characters possible, like <TAB>s? Or are all field contents printable alphanumeric characters?
Please note that it is far better to post or attach a sample input file, be it abbreviated, to work (and test) upon, than to show a picture.
This User Gave Thanks to RudiC For This Post:
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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)