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Full Discussion: Finding standard deviation for all columns in a data file
Top Forums Shell Programming and Scripting Finding standard deviation for all columns in a data file Post 302628247 by ks_reddy on Monday 23rd of April 2012 07:20:14 AM
Old 04-23-2012
I am getting syntax error.....
Hi Anantha,

I am getting syntax error after I modified the original script as below( by substituting your suggested portion of code).
Please correct the code so that it will run without any errors.

Code:
awk '{for x=1 to nf \
{lines++ ;arr[lines]=$x; sum+=$x ;}} \
END{ avg=sum/lines; sum=0; \    
 for(i=1; i<=lines; i++)  \
     	{ v=arr[i]-avg;  sum+= v*v }\
 printf("n=%d avg=%f  stddev=%f\n",lines, avg, sqrt( sum/( lines - 1) ) ) } ' filename

 

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LEARN ABOUT OPENSOLARIS

sum

sum(1B) 					     SunOS/BSD Compatibility Package Commands						   sum(1B)

NAME

       sum - calculate a checksum for a file

SYNOPSIS

       /usr/ucb/sum file...

DESCRIPTION

       sum  calculates	and  displays a 16-bit checksum for the named file and displays the size of the file in kilobytes. It is typically used to
       look for bad spots, or to validate a file communicated over some transmission line. The checksum is calculated by an  algorithm	which  may
       yield different results on machines with 16-bit ints and machines with 32-bit ints, so it cannot always be used to validate that a file has
       been transferred between machines with different-sized ints.

USAGE

       See largefile(5) for the description of the behavior of sum when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sum(1), wc(1), attributes(5), largefile(5)

DIAGNOSTICS

       Read error is indistinguishable from EOF on most devices; check the block count.

NOTES

       sum and /usr/bin/sum (see sum(1)) return different checksums.

       This utility is obsolete.

SunOS 5.11							    8 Nov 1995								   sum(1B)
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