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usrp/range: obtain avg/min/max from a series of values and eliminate outliers

This commit is contained in:
Werner Almesberger 2010-11-16 21:16:41 -03:00
parent 489acc49a5
commit c4d906bd8b

49
usrp/range Executable file
View File

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#!/usr/bin/perl
sub usage
{
print STDERR "usage: $0 [[-v] tolerance]\n";
exit(1);
}
$tol = 999;
if (@ARGV) {
$tol = shift @ARGV;
if ($tol eq "-v") {
$verbose = 1;
$tol = shift @ARGV;
}
&usage unless $tol =~ /^[0-9.]+$/;
&usage if @ARGV;
}
while (<>) {
chop;
push(@v, $_);
$s += $_;
}
$avg = $s/@v;
$n = 0;
for (@v) {
$n++;
if ($_ < $avg-$tol || $_ > $avg+$tol) {
print STDERR "sample $n is outlier: $_\n" if $verbose;
next;
}
$sum += $_;
$ns++;
$min = $_ if $_ < $min || !defined $min;
$max = $_ if $_ > $max || !defined $max;
}
if (!$ns) {
print STDERR "no samples\n";
exit(1);
}
print $sum/$ns, " $min $max\n";