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Top Forums UNIX for Dummies Questions & Answers Find and Replace random numeric value with non-numeric value Post 302446463 by Bahf1s on Wednesday 18th of August 2010 08:55:28 PM
Old 08-18-2010
Find and Replace random numeric value with non-numeric value

Can someone tell me how to change the first column in a very large 17k line file from a random 10 digit numeric value to a non numeric value. The format of lines in the file is:
1702938475,SNU022,201004

the first 10 numbers always begin with 170
 

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fmax(3M)						  Mathematical Library Functions						  fmax(3M)

NAME
fmax, fmaxf, fmaxl - determine maximum numeric value of two floating-point numbers SYNOPSIS
cc [ flag... ] file... -lm [ library... ] #include <math.h> double fmax(double x, double y); float fmaxf(float x, float y); long double fmaxl(long double x, long double y); DESCRIPTION
These functions determine the maximum numeric value of their arguments. NaN arguments are treated as missing data: if one argument is a NaN and the other numeric, these functions choose the numeric value. RETURN VALUES
Upon successful completion, these functions return the maximum numeric value of their arguments. If just one argument is a NaN, the other argument is returned. If x and y are NaN, a NaN is returned. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
fdim(3M), fmin(3M), math.h(3HEAD), attributes(5), standards(5) SunOS 5.10 1 Sep 2002 fmax(3M)
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