Hi,
I am trying to do a chart overlay using a normal distribution graphic based upon the mean and standard deviation acquired from the fieldsummary command. I can generate the values in perl (below) for a bell curve. Can you tell me how to do this in the Splunk Dashboard xml? Thanks.
#!/usr/bin/perl
# min, max, count, mean, stdev all come from the fieldsummary command.
$min = 0.442;
$max = 0.507;
$mean = 0.4835625;
$stdev = 0.014440074377630105;
$count = 128;
$pi = 3.141592653589793238462;
# The numbers above do not indicate a Gaussian distribution.
# Create an artificial normal distribution (for the plot overlay)
# based on 6-sigma.
$min = sprintf("%.3f", $mean - 3.0*$stdev); # use sprintf as a rounding function
$max = sprintf("%.3f", $mean + 3.0*$stdev);
$interval = ($max - $min)/($count - 1);
$x = $min;
for ($i=0; $i<$count; $i++)
{
$y = (1.0/($stdev*sqrt(2.0*$pi))) * exp(-0.5*((($x-$mean)/$stdev)**2));
$myFIELD[$i] = sprintf(%.3f",$y);
printf("myFIELD[$i]\n");
$x = $x + $interval;
}
exit;
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