Hi all,
I would like to extract records of a file based on a condition. The file contains 47 fields, and I would like to extract only those records that match a certain value in one of the columns, e.g.
COL1 COL2 COL3 ............... COL47
1 XX 45 ... (4 Replies)
Dear Guyz:)
I have 2 different input files like this. I would like to pick the values or letters from the inputfile2 based on inputfile1 keys (A,F,N,X,Z).
I have done similar task by using awk but in that case the inputfiles are similar like in inputfile2 (all keys in 1st column and values in... (16 Replies)
Hello
I have file that consist of 2 columns of millions of entries
timestamp and throughput
I want to find the average (throughput ) for each equal timestamp before change it to proper format
e.g : i want to average 2 coloumnd fot all 1308154800 values in column 1
and then
print... (4 Replies)
Hi I have a file like this. I need to eliminate lines with first column having the same value 10 times.
13 18 1 + chromosome 1, 122638287 AGAGTATGGTCGCGGTTG
13 18 1 + chromosome 1, 128904080 AGAGTATGGTCGCGGTTG
13 18 1 - chromosome 14, 13627938 CAACCGCGACCATACTCT
13 18 1 + chromosome 1,... (5 Replies)
Hello,
I have a data such as this:
ENSGALG00000000189 329 G A 4 2 0
ENSGALG00000000189 518 T C 5 1 0
ENSGALG00000000189 1104 G A 5 1 0
ENSGALG00000000187 3687 G T 5 1 0
ENSGALG00000000187 4533 A T 4 2 0
ENSGALG00000000233 5811 T C 4 2 0
ENSGALG00000000233 5998 C A 5 1 0
I want to... (3 Replies)
Hi,
I have a table to be imported for R as matrix or data.frame but I first need to edit it because I've got several lines with the same identifier (1st column), so I want to sum the each column (2nd -nth) of each identifier (1st column)
The input is for example, after sorted:
K00001 1 1 4 3... (8 Replies)
Dear all ...
I have a file which I want to change the structure based on the values in some columns and I would be grateful if you can help...
one of my files looks like ... they all have ten rows
1,0,0
10,0,0
2,0,0
3,0,0
4,1,1
4,1,1
4,1,1
5,0,0
6,0,0
7,0,0
8,0.5,2
9,0.33,3
9,0.33,3... (1 Reply)
I have a file (myfile.txt) with contents like this:
1.txt apple is
3.txt apple is
5.txt apple is
2.txt apple is a
7.txt apple is a
8.txt apple is a fruit
4.txt orange not a fruit
6.txt zero isThe above file is already sorted using this command:
sort -k2 myfile.txtMy objective is to get... (3 Replies)
Hi,
I tried filtering the records in a csv file using "awk" command listed below.
awk -F"~" '$4 ~ /Active/{print }' inputfile > outputfile
The output always has all the entries.
The same command worked for different users from one of the forum links.
content of file I was... (3 Replies)
Discussion started by: sunilmudikonda
3 Replies
LEARN ABOUT DEBIAN
rgb2pct
rgb2pct(1) General Commands Manual rgb2pct(1)NAME
rgb2pct - rgb2pct.py Convert a 24bit RGB image to 8bit paletted
SYNOPSIS
rgb2pct.py [-n colors | -pct palette_file] [-of format] source_file dest_file
DESCRIPTION
This utility will compute an optimal pseudo-color table for a given RGB image using a median cut algorithm on a downsampled RGB histogram.
Then it converts the image into a pseudo-colored image using the color table. This conversion utilizes Floyd-Steinberg dithering (error
diffusion) to maximize output image visual quality.
-n colors:
Select the number of colors in the generated color table. Defaults to 256. Must be between 2 and 256.
-pct palette_file:
Extract the color table from palette_file instead of computing it. Can be used to have a consistant color table for multiple files. The
palette_file must be a raster file in a GDAL supported format with a palette.
-of format:
Format to generated (defaults to GeoTIFF). Same semantics as the -of flag for gdal_translate. Only output formats supporting
pseudocolor tables should be used.
source_file:
The input RGB file.
dest_file:
The output pseudo-colored file that will be created.
NOTE: rgb2pct.py is a Python script, and will only work if GDAL was built with Python support.
EXAMPLE
If it is desired to hand create the palette, likely the simpliest text format is the GDAL VRT format. In the following example a VRT was
created in a text editor with a small 4 color palette with the RGBA colors 238/238/238/255, 237/237/237/255, 236/236/236/255 and
229/229/229/255.
% rgb2pct.py -pct palette.vrt rgb.tif pseudo-colored.tif
% more < palette.vrt
<VRTDataset rasterXSize="226" rasterYSize="271">
<VRTRasterBand dataType="Byte" band="1">
<ColorInterp>Palette</ColorInterp>
<ColorTable>
<Entry c1="238" c2="238" c3="238" c4="255"/>
<Entry c1="237" c2="237" c3="237" c4="255"/>
<Entry c1="236" c2="236" c3="236" c4="255"/>
<Entry c1="229" c2="229" c3="229" c4="255"/>
</ColorTable>
</VRTRasterBand>
</VRTDataset>
AUTHOR
Frank Warmerdam warmerdam@pobox.com
GDAL Tue Sep 18 2012 rgb2pct(1)