gno/usr.bin/awk/tests/histogram

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# histogram
# input: numbers between 0 and 100
# output: histogram of deciles
{ x[int($1/10)]++ }
END { for (i = 0; i < 10; i++)
printf(" %2d - %2d: %3d %s\n",
10*i, 10*i+9, x[i], rep(x[i],"*"))
printf("100: %3d %s\n", x[10], rep(x[10],"*"))
}
function rep(n,s, t) { # return string of n s's
while (n-- > 0)
t = t s
return t
}