Hello Monks, I’ve done some perl in the past (wish I’d seen this site then) but it has been a while. I have some if logic/parentheses not working. The code is meant to identify outliers in triplicate data values. Here is some of it. 
$a= 20;
$b= 22.5;
$c= 23
$atob = $a - $b;
$btoc = $b - $c;
$atoc = $a - $c;

if (((atob > 1 ) || (atob < -1)) && ((atoc > 1) || (atoc < -1)) && ((b
+toc > 1) || (btoc < -1))) {
print OUTFILE "DIFF > 1 all three\n";
    $matrixflags[$row - 4][$i] = 1;
    $matrixflags[$row - 3][$i] = 1;
    $matrixflags[$row - 2][$i] = 1;
}
elsif (((atob > 1) || (atob < -1)) && ((btoc < 1) && (btoc > -1)) && (
+(atoc > 1) || (atoc < -1))) {
print OUTFILE "DIFFA > 1 $atob  $atoc $btoc\n";
    $matrixflags[$row - 4][$i] = 1;
    $matrixflags[$row - 3][$i] = 0;
    $matrixflags[$row - 2][$i] = 0;
}
elsif (((atob > 1) || (atob < -1)) && ((btoc > 1) || (btoc < -1)) && (
+(atoc < 1) && (atoc > -1))) {
print OUTFILE "DIFFB > 1 $atob  $atoc $btoc\n";
    $matrixflags[$row - 4][$i] = 0;
    $matrixflags[$row - 3][$i] = 1;
    $matrixflags[$row - 2][$i] = 0;
}
elsif (((atob < 1) && (atob > -1)) && ((btoc > 1) || (btoc < -1)) && (
+(atoc > 1) || (atoc < -1))) {
print OUTFILE "DIFFC > 1 $atob  $atoc $btoc\n";
    $matrixflags[$row - 4][$i] = 0;
    $matrixflags[$row - 3][$i] = 0;
    $matrixflags[$row - 2][$i] = 1;
}
#So in this example in my head the 1st elsif should be executed.
#Difference $atob = 1.5 so ((atob > 1) || (atob < -1)) is true.
#Difference $btoc = 0.5 so ((btoc < 1) && (btoc > -1)) is true.
#Difference $atoc = 3 so ((atoc > 1) || (atoc < -1)) is true.

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During debugging the values seem to make sense but I’m not executing the any of the statements. Any ideas? Thanks Elliott

In reply to if logic OR parentheses problem by Ellhar

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