09-13-2015
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
I have a header which I have to add to a sorted file, however if I use
cat header sortedfile > newfile, the operation takes 2 minutes as the sorted file is over 400mb.
I have noticed that when I sort the 400mb unsorted file, this only takes 14 seconds to create the output.
As... (2 Replies)
Discussion started by: clarcombe
2 Replies
2. UNIX for Dummies Questions & Answers
So, I have a file that has some duplicate lines. The file has a header line that I would like to keep at the top.
I could do this by extracting the header from the file, 'sort -u' the remaining lines, and recombine them. But they are quite big, so if there is a way to do it with a single... (1 Reply)
Discussion started by: Digby
1 Replies
3. Shell Programming and Scripting
Hi,
Please help with this problem. Somehow does not work for me.
test.txt
CHR SNP BP A1 C_A C_U A2 CHISQ P OR
19 rs10401969 19268718 C 222 890 T 0.03462 0.8524 0.9857
1 rs10873889 ... (4 Replies)
Discussion started by: genehunter
4 Replies
4. Shell Programming and Scripting
Hi Experts,
I want to Sort the data in fixed width file where i have Header and Footer also in file.
I m using below commad to do the sort based on field satarting from 15 position to 17 position , but it is not ignoring the Header and Footer of the file while sorting. In the output i am... (5 Replies)
Discussion started by: sasikari
5 Replies
5. Shell Programming and Scripting
I am having report file with header and footer . The details in between header and footer are separated by a pipe charater. I want to sort the file by considering multiple columns in between header and footer.
pls help (4 Replies)
Discussion started by: suryanarayana
4 Replies
6. UNIX for Dummies Questions & Answers
How to sort a tab delimited file first on col1 and then on col2. Also I need to keep the header intact.
file.txt
val1 val2 val3 val4
a b c d
m n o p
e f g h
i j k l
... (3 Replies)
Discussion started by: mary271
3 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I'm trying to sort 2 different .txt tab delimited files with the command line:
sort -k 1b,1 inputfile > outputfile
But doing that i'm also sorting the header (that ends at the end of my file).
How can i sort a .txt file without sorting the header but conserving the header in the... (3 Replies)
Discussion started by: alisrpp
3 Replies
8. UNIX for Dummies Questions & Answers
I have several las files with a header and each file start Version and text and before the data starts end up with ~Ascii, then the numbers starts:
-------------------------------------------------------------------------
~Version
.....text....
~Ascii
2 abc 230 1 name
1 abc 400 1... (17 Replies)
Discussion started by: tk2000
17 Replies
9. Shell Programming and Scripting
Hi,
I am using SUN SOLARIS (SunOS sun4v sparc SUNW, T5240).
I have a huge data file with header and trailer. This file gets used into an ETL process. ETL skips the header record (which is the first record of the file) and loads the rest of the record. The file can be delimited (comma,... (5 Replies)
Discussion started by: Saanvi1
5 Replies
10. Shell Programming and Scripting
Hi ,
My UNIX system is SUN Solaris.
I am trying to do a simple thing as described below.
I have a PIPE delimited file that has header and trailer. So the file is something like below:
Test1.txt looks like something below:
field_data1|field_data2|and some more data --Header
... (5 Replies)
Discussion started by: Saanvi1
5 Replies
PHISTO(1) General Commands Manual PHISTO(1)
NAME
phisto - compute a luminance histogram from one or more RADIANCE pictures
SYNOPSIS
phisto picture ..
DESCRIPTION
Phisto is a script that calls pfilt(1), rcalc(1) and histo(1) to compute a histogram of log luminance values for foveal samples in the
given picture files. A foveal sample covers approximately 1 degree, though this script does not use this exact area. The minimum and max-
imum values are determined, and 100 histogram bins are uniformly divided between these extrema. Foveal samples less than 1e-7 cande-
las/sq.meter are silently ignored. If no picture is named on the command line, the standard input is read.
The primary function of this script is to precompute histograms for the pcond(1) program, which may then be used to compute multiple, iden-
tical exposures. This is especially useful for animations and image comparisons.
EXAMPLE
To compute two identical tone mappings for image1.hdr and image2.hdr:
phisto image1.hdr image2.hdr > both.histo
pcond -I -h image1.hdr < both.histo > image1m.hdr
pcond -I -h image2.hdr < both.histo > image2m.hdr
AUTHOR
Greg Ward Larson
SEE ALSO
histo(1), pcond(1), pfilt(1), pvalue(1), rcalc(1), total(1)
RADIANCE
3/12/98 PHISTO(1)