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Top Forums Shell Programming and Scripting Averaging each row with null values Post 302611081 by ida1215 on Thursday 22nd of March 2012 08:42:45 AM
Old 03-22-2012
Thank you very much for the code its just what I needed, thanks for saving my night,SmilieSmilie

---------- Post updated at 09:42 PM ---------- Previous update was at 08:53 PM ----------

There is one more glitch, am sorry for missing this out. I have some rows with entirely null values and as such using the previous code I ended up with getting fatal error (attempted division by zero). how can it be resolved? how to tell the script that when all values in the row is null (NaN), put NaN on that corresponding row average.
Code:
1.4 1.2 1.5 NaN 1.6 = (1.4+1.2+1.5+1.6)/4
1.3 1.1 NaN 1.3 NaN = (1.3+1.1+1.3)/3 
2.4 1.3 1.5 NaN 1.5 = (2.4+1.3+1.5+1.5)/4
NaN 1.2 NaN 1.4 NaN = (1.2+1.4)/2
NaN NaN NaN NaN NaN = NaN
NaN NaN NaN NaN NaN = NaN

Many thanks.
 

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CEXP(3) 						   BSD Library Functions Manual 						   CEXP(3)

NAME
cexp -- complex exponential function SYNOPSIS
#include <complex.h> double complex cexp(double complex z); long double complex cexpl(long double complex z); float complex cexpf(float complex z); DESCRIPTION
cexp(z) returns the complex exponential of z. cexp(conj(z)) = conj(cexp(z)), for all complex floating-point numbers z. SPECIAL VALUES
The conjugate symmetry of cexp() is used to abbreviate the specification of special values. cexp(+-0 + 0i) returns 1 + 0i. cexp(x + inf i) returns NaN + NaN i, and raises the invalid flag, for finite x. cexp(x + NaN i) returns NaN + NaN i, for finite x. cexp(inf + 0i) returns inf + 0i. For the following two cases, cis(y) denotes cos(y) + I*sin(y). cexp(-inf + yi) returns 0*cis(y), for finite y. cexp(inf + yi) returns inf*cis(y), for finite nonzero y. cexp(-inf + inf i) returns -0 + 0i. cexp(inf + inf i) returns -inf + NaN i, and raises the invalid flag. cexp(-inf + NaN i) returns -0 + 0i. cexp(inf + NaN i) returns -inf + NaN i. cexp(NaN + 0i) returns NaN + 0i. cexp(NaN + yi) returns NaN + NaN i for all nonzero numbers y. cexp(NaN + NaN i) returns NaN + NaN i. SEE ALSO
exp(3) clog(3) complex(3) STANDARDS
The cexp() function conforms to ISO/IEC 9899:2011. 4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution
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