07-24-2013
Less negative "%s%4s%10s\n" ?
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Hi, I have two files.
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CTL Port IO Rate(IOPS) Read Rate(IOPS) Write Rate(IOPS) Read Hit(%) Write Hit(%) Trans. Rate(MB/S) Read Trans. Rate(MB/S) Write Trans. Rate(MB/S) 09:36:48
0 A 136 0 135 97 100 ... (6 Replies)
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Hi All,
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Cu1nullL1L2
Cu2nullL1L2
Cu3nullL1L2
file2.txt
Cu1B1B2
Cu3B1B2
output.txt
Cu1L1B1L2B2
Cu2L1L2
Cu3L1B1L2B3
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ATAN2(3) Linux Programmer's Manual ATAN2(3)
NAME
atan2, atan2f, atan2l - arc tangent function of two variables
SYNOPSIS
#include <math.h>
double atan2(double y, double x);
float atan2f(float y, float x);
long double atan2l(long double y, long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
atan2f(), atan2l():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99
DESCRIPTION
The atan2() function calculates the principal value of the arc tangent of y/x, using the signs of the two arguments to determine the quad-
rant of the result.
RETURN VALUE
On success, these functions return the principal value of the arc tangent of y/x in radians; the return value is in the range [-pi, pi].
If y is +0 (-0) and x is less than 0, +pi (-pi) is returned.
If y is +0 (-0) and x is greater than 0, +0 (-0) is returned.
If y is less than 0 and x is +0 or -0, -pi/2 is returned.
If y is greater than 0 and x is +0 or -0, pi/2 is returned.
If either x or y is NaN, a NaN is returned.
If y is +0 (-0) and x is -0, +pi (-pi) is returned.
If y is +0 (-0) and x is +0, +0 (-0) is returned.
If y is a finite value greater (less) than 0, and x is negative infinity, +pi (-pi) is returned.
If y is a finite value greater (less) than 0, and x is positive infinity, +0 (-0) is returned.
If y is positive infinity (negative infinity), and x is finite, pi/2 (-pi/2) is returned.
If y is positive infinity (negative infinity) and x is negative infinity, +3*pi/4 (-3*pi/4) is returned.
If y is positive infinity (negative infinity) and x is positive infinity, +pi/4 (-pi/4) is returned.
ERRORS
No errors occur.
CONFORMING TO
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.
SEE ALSO
acos(3), asin(3), atan(3), carg(3), cos(3), sin(3), tan(3)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2010-09-20 ATAN2(3)