Shell Programming and Scripting

BEGIN{
FS=","
}
{
for(i=1;i<NF;i++)
    {
        total[i]+=$i;
        totalSquared[i]+=$i^2;
    }
numberColumn=NF;
}
END{
for (i=1;i<numberColumn;i++)
    {
        media=total[i]/NR;
        printf("%.2f|%.2f\n",media,sqrt((totalSquared[i]/NR)-media^2));
    }
}

BEGIN{ FS="," }
{
    for(i=1;i <=  NF;i++)
    {
        total[i]+=$i;
        totalSquared[i]+=$i^2;
    }
    numberColumn=NF;
}
END{
    for (i=1;i <= numberColumn;i++)
    {
        media=total[i]/NR;
        printf("%.2f|%.2f\n",media,sqrt((totalSquared[i]/NR)-media^2));
    }
}