test.sh

#!/usr/bin/env bash

index="0"
sum1="0"
sum2="0"
sum1n="2080"
sum2n="4.74389090370576902576"

echo -n "" >test.out

for i in $(seq 1 64)
do
	sum1=$(echo "$sum1+$i/$sum1n" | bc -l)
	sum2=$(echo "$sum2+(1/$i)/$sum2n" | bc -l)
	echo -e "$i\t$sum1\t$sum2" >>test.out
done

echo "plot 'test.out' using 1:2 with lines title 'int', 'test.out' using 1:3 with lines title 'float'" | gnuplot -persist