I am trying to calculate row averages (excluding
0's) for all the rows in a CSV file except the first
column. The first column is an entitiy name and is
not used in the calculation of the average.My input CSV
file is as follows: 

 test.dat 

AAA01,1.45,0.42,1.54,1.49,1.47,1.36,1.81,0.47,1.8,0.55 
ABA05,1.29,1.09,1.13,1.88,1.11,1.44,1.25,1.23,1.05,1.39 
BCD06,4.58,4.24,3.87,3.9,4.13,2.04,3.34,7.6,3.58,1.26,7.45
DFG12,26,26.34,24.59,26.46,26.24,26.14,32.35,31.77,31.77
MJK82,8.27,13.23,7.73,8.85,9.15,13.95,0,0,0,0,0
POU45,3.07,3.14,2.97,3.28,21.65,54.23,3.16,3.02,3.26 
RTY76,1.22,1.3,1.11,0.92,1.57,1.06,1.01,0.87,0.93 
SDH45,15.38,12,22.32,23.3,19.74,46.42,2.06,1.7,2.17 
WPL02,13.24,13.23,7.73,8.85,9.15,13.95,0,0,0,0,0

[download]


I have been able to calculate a column average for all
of the columns, except the 1st column. The code I am
using to accomplish this is as follows: 

open my $CPUFILE, "<", $file or die "Unable to open sorted file $!"; 

my @col_total;
my @col_count;
my @col_average;
while (<$CPUFILE>) {
    chomp;
    my @f = split /,/;
    shift @f;   # remove the 1st column
    my $num_cols = scalar @f;
    for my $i (0 .. $num_cols-1) {
        my $val = $f[$i];
        if ($val>0) {
           $col_count[$i]++;
           $col_total[$i] += $val;
        }
    }
}

for my $i (0 .. $#col_num) {
    $col_average[$i] = $col_total[$i]/$col_count[$i];
    print "Column ", ($i + 2), " Average = $col_average[$i]\n";
}

close $CPUFILE or die; 

my $total = 0; 
$total += $_ for @col_average; 
print "Average CPU Time for Column for all servers in cpuatest.dat fil
+e is ";
print $total/@col_average, "\n";

[download]


I am rather new to array processing and perl. Can
someone please tell me how to read the values of the
row into an array and then iterate over the array to
calculate an average (excluding 0's) for each row?

In reply to Calculating Row Averages From a CSV File by rayv

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