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Full Discussion: Calculating the Standard Deviation for a column
Top Forums UNIX for Dummies Questions & Answers Calculating the Standard Deviation for a column Post 302317316 by jim mcnamara on Monday 18th of May 2009 04:58:21 PM
Old 05-18-2009
try this:
Code:
awk '{ lines=FNR; arr[lines]=$3; sum+=$3}
     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 PHP

db2_field_scale

DB2_FIELD_SCALE(3)							 1							DB2_FIELD_SCALE(3)

db2_field_scale - Returns the scale of the indicated column in a result set

SYNOPSIS

       int db2_field_scale (resource  $stmt, mixed  $column)

DESCRIPTION

	Returns the scale of the indicated column in a result set.

PARAMETERS

	      o $stmt
		- Specifies a statement resource containing a result set.

	      o $column
		-  Specifies  the  column in the result set. This can either be an integer representing the 0-indexed position of the column, or a
		string containing the name of the column.

RETURN VALUES

	Returns an integer containing the  scale  of  the  specified  column.  If  the	specified  column  does  not  exist  in  the  result  set,
       db2_field_scale(3) returns FALSE.

SEE ALSO

       db2_field_display_size(3), db2_field_name(3), db2_field_num(3), db2_field_precision(3), db2_field_type(3), db2_field_width(3).

PHP Documentation Group 													DB2_FIELD_SCALE(3)
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