LOG(3) BSD Library Functions Manual LOG(3)NAME
log, log2, log10, log1p, -- logarithm functions
SYNOPSIS
#include <math.h>
double
log(double x);
double
log2(double x);
double
log10(double x);
double
log1p(double x);
DESCRIPTION
The log() function computes the value of the natural logarithm of argument x.
The log2() function computes the value of the logarithm of argument x to base 2.
The log10() function computes the value of the logarithm of argument x to base 10.
The log1p() function computes the value of log(1+x) accurately even for very small values of x.
SPECIAL VALUES
log(+-0) , log2(+-0) , and log10(+-0) return -infinity and raise the "divide-by-zero" floating-point exception.
log(1) , log2(1) , and log10(1) return +0.
log(x) , log2(x) , and log10(x) return a NaN and raise the "invalid" floating-point exception for x < 0.
log(+infinity) , log2(+infinity) , and log10(+infinity) return +infinity.
log1p(+-0) returns +-0.
log1p(-1) returns -infinity and raises the "divide-by-zero" floating-point exception.
log1p(x) returns a NaN and raises the "invalid" floating-point exception for x < -1.
log1p(+infinity) returns +infinity.
SEE ALSO math(3), exp(3), exp2(3), expm1(3), pow(3), infnan(3)STANDARDS
The log() , log2() , log10() , and log1p() functions conform to ISO/IEC 9899:1999(E).
4th Berkeley Distribution July 2, 2003 4th Berkeley Distribution
Check Out this Related Man Page
LOG(3) BSD Library Functions Manual LOG(3)NAME
log, log2, log10, log1p, -- logarithm functions
SYNOPSIS
#include <math.h>
double
log(double x);
double
log2(double x);
double
log10(double x);
double
log1p(double x);
DESCRIPTION
The log() function computes the value of the natural logarithm of argument x.
The log2() function computes the value of the logarithm of argument x to base 2.
The log10() function computes the value of the logarithm of argument x to base 10.
The log1p() function computes the value of log(1+x) accurately even for very small values of x.
SPECIAL VALUES
log(+-0) , log2(+-0) , and log10(+-0) return -infinity and raise the "divide-by-zero" floating-point exception.
log(1) , log2(1) , and log10(1) return +0.
log(x) , log2(x) , and log10(x) return a NaN and raise the "invalid" floating-point exception for x < 0.
log(+infinity) , log2(+infinity) , and log10(+infinity) return +infinity.
log1p(+-0) returns +-0.
log1p(-1) returns -infinity and raises the "divide-by-zero" floating-point exception.
log1p(x) returns a NaN and raises the "invalid" floating-point exception for x < -1.
log1p(+infinity) returns +infinity.
SEE ALSO math(3), exp(3), exp2(3), expm1(3), pow(3), infnan(3)STANDARDS
The log() , log2() , log10() , and log1p() functions conform to ISO/IEC 9899:1999(E).
4th Berkeley Distribution July 2, 2003 4th Berkeley Distribution
I have two log files which keeps appending every sec...I want to extract a certain field from each file(using awk for extracting the data) and compare them in real time...
ex:
log1
122
234
567
log2
234
567
log3
122
i need a log3 which keeps appending the data found in log1 and... (7 Replies)
Hi Folks,
I have a apache log file that has double entries (however not all lines appear twice).
How can I delete automatically the first line of a double entry?
Your help is greatly appreciated.
Thanks,
Klaus
Here is what the log file looks like
217.81.190.164 - - "GET... (7 Replies)
Hi Guys ,
Please help me I am having a requirement as below:
$ ls -i log* | head
66486532 log1
66486662 log10
66486663 log11
66486664 log12
66486665 log13
66486533 log2
66486534 log3
66486535 log4
66486584 log5
66486590 log6
This id listing the first 10 files starting with log.
... (4 Replies)
Hi,
I am able to take the log value for the third column of a file using the script below. But I want to take the log2 (not the log). How would I write that?
thanks
awk 'BEGIN {OFS="\t"} {print $1, $2, log ($3)}' (2 Replies)
Hello All,
I need to delete all the files with a particular naming format at a fixed path except the latest 1. Please help.
example:
At path /tmp, I have 3 files viz: log1, log2 and log3. file log2 was the one that was modified most recently. So I need to find and delete log1 and log3... (2 Replies)
How can I list files with the following specific criteria?
I am trying this $> ls *.log or $>ls *.log? -->
but it only gives me fsaffa.log1, rwerw.log2.
How can I get all three files with a simple selection criteria ? (5 Replies)
Hi All,
I have a huge log file where user information such as name,address,point balance etc are stored.
I need to extract only point balance,first name,last name only.
How to achieve this, tried with awk and jq but could not get the result.
Log file
... (6 Replies)