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Full Discussion: create a basic script
Top Forums Shell Programming and Scripting create a basic script Post 302349641 by Estanislau on Tuesday 1st of September 2009 11:55:50 AM
Old 09-01-2009
create a basic script

Hi everybody Smilie Smilie Smilie,
I need someone to help me! I have a file with 4 colunms and I would like to transform only the 4th colunm by multiplying this by a constant value (i.e 0.3047). I'm a new one using/creating basic scripts and I'm using linux redhat.
The file has the following configuration (separeted by colunms):

115675.040000 9358616.700000 0.000000 4995,450195
115675.040000 9358616.700000 50.000000 4995,450195
115675.040000 9358616.700000 100.000000 5008,660156
................. .................. ............ ...............
................. .................. ............. ...............

Is it possible to create in unix/linux a script to make this operation?
PS: The file is too big to do it in the excel.
 

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creat(2)							   System Calls 							  creat(2)

NAME
creat - create a new file or rewrite an existing one SYNOPSIS
#include <sys/stat.h> #include <fcntl.h> int creat(const char *path, mode_t mode); DESCRIPTION
The function call creat(path, mode) is equivalent to: open(path, O_WRONLY | O_CREAT | O_TRUNC, mode) RETURN VALUES
Refer to open(2). ERRORS
Refer to open(2). EXAMPLES
Example 1 Creating a File The following example creates the file /tmp/file with read and write permissions for the file owner and read permission for group and oth- ers. The resulting file descriptor is assigned to the fd variable. #include <fcntl.h> ... int fd; mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; char *filename = "/tmp/file"; ... fd = creat(filename, mode); ... USAGE
The creat() function has a transitional interface for 64-bit file offsets. See lf64(5). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
open(2), attributes(5), largefile(5), lf64(5), standards(5) SunOS 5.11 25 Mar 2002 creat(2)
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