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/* print histogram of integer attribute */
BEGIN {
int count[];
int maxd = 0;
int i, d, v;
char* attrname = ARGV[0];
}
N{
v = (int)(aget($,attrname));
count[v]++;
if (v > maxd) {
maxd = v;
}
}
END {
for (i = 1; i <= maxd; i++) {
d = count[i];
if (d > 0) printf ("[%d] %d\n", i, d);
}
}