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Shell Programming and Scripting
How to create SQRT function in catenate file
Post 302150120 by ahjiefreak on Monday 10th of December 2007 07:39:11 AM
12-10-2007
Hi
Where the 'constant' (h) gets assigned it's value?
The h is actually counting the number of folders from other variables.
What do you think the value of '$t' in 'sqrt($t)' is?
Why are you trying "pipe" 'sqrt($t)' into 'bc -l'? Wouldn't a simple 't=sqrt(t)' be enough?
Yeah. I already tried on sqrt(t); which is without bc -l.
You are right. I am using associative array count for the purpose to read each line.
However, when I get the result from the operation, it doesnt return me the correct output from these operation.Did I missed out any "$" in the below fragment of code? It gives me INF and NAN value
cat a.txt| awk ' {
t= h*($3+$2);
s= sqrt($t)
count($1)=$2/s
}
END{
printf("the sqrt of %d is %d\n", $2,$1);
}
Please advise.Thanks.
Rgrds,
Jason
Where the 'constant' (h) gets assigned it's value?
The h is actually counting the number of folders from other variables.
What do you think the value of '$t' in 'sqrt($t)' is?
Why are you trying "pipe" 'sqrt($t)' into 'bc -l'? Wouldn't a simple 't=sqrt(t)' be enough?
Yeah. I already tried on sqrt(t); which is without bc -l.
You are right. I am using associative array count for the purpose to read each line.
However, when I get the result from the operation, it doesnt return me the correct output from these operation.Did I missed out any "$" in the below fragment of code? It gives me INF and NAN value
cat a.txt| awk ' {
t= h*($3+$2);
s= sqrt($t)
count($1)=$2/s
}
END{
printf("the sqrt of %d is %d\n", $2,$1);
}
Please advise.Thanks.
Rgrds,
Jason
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LEARN ABOUT SUNOS
sqrt
sqrt(3M) Mathematical Library Functions sqrt(3M) NAME
sqrt, sqrtf, sqrtl - square root function SYNOPSIS
cc [ flag... ] file... -lm [ library... ] #include <math.h> double sqrt(double x); float sqrtf(float x); long double sqrtl(long double x); DESCRIPTION
These functions compute the square root of their argument x. RETURN VALUES
Upon successful completion, these functions return the square root of x. For finite values of x < -0, a domain error occurs and either a NaN (if supported) or an implementation-defined value is returned. If x is NaN, a NaN is returned. If x is +-0 or +Inf, x is returned. If x is -Inf, a domain error occurs and a NaN is returned. ERRORS
These functions will fail if: Domain Error The finite value of x is < -0 or x is -Inf. If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the invalid floating-point exception is raised. The sqrt() function sets errno to EDOM if the value of x is negative. USAGE
An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception has been raised. An application should either examine the return value or check the floating point exception flags to detect exceptions. An application can also set errno to 0 before calling sqrt(). On return, if errno is non-zero, an error has occurred. The sqrtf() and sqrtl() functions do not set errno. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
feclearexcept(3M), fetestexcept(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5) SunOS 5.10 1 Nov 2003 sqrt(3M)