Heres a script i wrote as a bit of practise. What it does is insert a line in the middle of a file. The line being $1 and the file being $2
#!/bin/bash
rm tempfile
touch tempfile
count=1
linenum= `wc -l < $2`
if
then
echo $1 >> $2
else
even=`expr "$linenum" % 2`
if
then... (3 Replies)
I've got:
isql -U $USERID -S $SERVER -D $DATABASE -i inputfile.sql -o outputfile.txt
in inputfile I have:
go
sql#1
go
sql#2
go
sql#3
go
I also tried without "go" and with";" instead which did not work
SQL statements will work if I paste them directly into the script and use EOF
... (0 Replies)
if input to the perl program is ' ( p * ((a+b) * (c+d))) + q ' it shuld give the output as ' pac + pad + pbc + pbd + q ' .can anyone suggest a way to do this ? (7 Replies)
how i can read a long integer from standar input and a string with as many characters as specified in the number?
i thing that i must use the read command ofcourse.... (6 Replies)
Hello,
I'm trying to write a while loop for a decimal value in tcsh which I know can't be done. Instead I want my increments to be one order of magnitude too large and then divide it by 10 when I use the variable. However, I don't know how to divide my variable and set it as another.
set... (1 Reply)
Hiii
I actually intent to check the integer or floating point number input by user i.e. 23, 100, 55.25, 12.50 ..etc. However, when someone input strings or alpha character, my program has to show invalid input.!! Is there any Unix shell script syntax can help me to check ?
Thanking you (2 Replies)
Hi guys, I asked for help on programming forums and no one didn't helped me so I ask for help here. I am playing with some tasks from my book and I can't figure where did I get wrong.
From the first program I get a blank screen, program won't generate 10*10 matrix.
And second problem is I... (6 Replies)
Hi, I am trying to make a maths calculator that:
1. Prompts the user for a number.
2. Prompts the user for an operation (add, subtract, divide or multiply)
3. Prompts the user for a number.
4. Prompts the user for another operation (same as above) OR the option to get the result for the... (4 Replies)
Hi,
Need help on this. I need to increment a variable by 1 but retain as 2 characters.
I am using expr to do additions:
NEWSERIAL=`expr $SERIAL + 1`
$SERIAL can range from 01-99. After adding "1", I need the result to be 2 characters, eg: 02+1 = 03. By default expr will truncate the... (4 Replies)
Hi guys...
I am loving this integer maths thing.
64 bit systems are certainly easier than 32 bit, but hey, I don't intend to leave out my fav' platform.
Using one of the 'Brothers' methods, URL inside the code.
#!/bin/sh
#
# #!/usr/local/bin/dash
# e_constant.sh
# Brother's formula .
#... (2 Replies)
Discussion started by: wisecracker
2 Replies
LEARN ABOUT DEBIAN
nearblack
nearblack(1) General Commands Manual nearblack(1)NAME
nearblack - nearblack convert nearly black/white borders to black
SYNOPSIS
nearblack [-of format] [-white | [-color c1,c2,c3...cn]*] [-near dist] [-nb non_black_pixels]
[-setalpha] [-setmask] [-o outfile] [-q] [-co "NAME=VALUE"]* infile
DESCRIPTION
This utility will scan an image and try to set all pixels that are nearly or exactly black, white or one or more custom colors around the
collar to black or white. This is often used to 'fix up' lossy compressed airphotos so that color pixels can be treated as transparent when
mosaicing.
-o outfile:
The name of the output file to be created. Newly created files are created with the HFA driver by default (Erdas Imagine - .img)
-of format:
(GDAL 1.8.0 or later) Select the output format. Use the short format name (GTiff for GeoTIFF for examle).
-co 'NAME=VALUE':
(GDAL 1.8.0 or later) Passes a creation option to the output format driver. Multiple -co options may be listed. See format specific
documentation for legal creation options for each format. Only valid when creating a new file
-white:
Search for nearly white (255) pixels instead of nearly black pixels.
-color c1,c2,c3...cn:
(GDAL >= 1.9.0) Search for pixels near the specified color. May be specified multiple times. When -color is specified, the pixels that
are considered as the collar are set to 0.
-near dist:
Select how far from black, white or custom colors the pixel values can be and still considered near black, white or custom color.
Defaults to 15.
-nb non_black_pixels:
number of non-black pixels that can be encountered before the giving up search inwards. Defaults to 2.
-setalpha:
(GDAL 1.8.0 or later) Adds an alpha band if the output file is specified and the input file has 3 bands, or sets the alpha band of the
output file if it is specified and the input file has 4 bands, or sets the alpha band of the input file if it has 4 bands and no output
file is specified. The alpha band is set to 0 in the image collar and to 255 elsewhere.
-setmask:
(GDAL 1.8.0 or later) Adds a mask band to the output file, or adds a mask band to the input file if it does not already have one and no
output file is specified. The mask band is set to 0 in the image collar and to 255 elsewhere.
-q:
(GDAL 1.8.0 or later) Suppress progress monitor and other non-error output.
infile:
The input file. Any GDAL supported format, any number of bands, normally 8bit Byte bands.
The algorithm processes the image one scanline at a time. A scan 'in' is done from either end setting pixels to black or white until at
least 'non_black_pixels' pixels that are more than 'dist' gray levels away from black, white or custom colors have been encountered at
which point the scan stops. The nearly black, white or custom color pixels are set to black or white. The algorithm also scans from top to
bottom and from bottom to top to identify indentations in the top or bottom.
The processing is all done in 8bit (Bytes).
If the output file is omitted, the processed results will be written back to the input file - which must support update.
AUTHORS
Frank Warmerdam warmerdam@pobox.com
GDAL Tue Sep 18 2012 nearblack(1)
08-12-2011
Awk can work with floating numbers (even "old" awk, afaik).