set logscale x set xrange [2:4192] set key bottom set xtics (4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048) set grid ytics set xlabel "sample size" set ylabel "measurements" plot "conf-interval.txt" title "mean" with lines, \ "conf-interval.txt" using 1:2:4 title "95% confidence interval" with yerrorbars lt 3