我有这样的数据：
![#Size conc Cumconc Midpoint Diameter conc Cumconc Midpoint Diameter conc Cumconc
0.337 1788.647911 2679394.57 0.337 1583.950394 1085006.02 0.337 846.9754269 1333139.322
0.419 671.5617583 1005999.514 0.419 604.4813591 414069.731 0.419 353.3910197 556237.465
0.522 227.8372837 341300.251 0.522 192.4245766 131810.835 0.522 198.8547746 312997.4152
0.65 71.93152603 107753.426 0.65 58.52586701 40090.2189 0.65 71.10833659 111924.5218
0.809 39.83629606 59674.7715 0.809 28.31269255 19394.1944 0.809 49.12599943 77324.3231
0.997 26.33886829 39455.6247 0.997 17.56852188 12034.43749 0.997 40.27617821 63394.7045
1.244 10.69495002 16021.03513 1.244 7.027818774 4814.05586 1.244 15.75314508 24795.45036
1.562 8.939251215 13390.99832 1.562 5.863628745 4016.58569 1.562 12.25755549 19293.39234
1.944 9.94324986 14894.98829 1.944 6.499851182 4452.39806 1.944 12.77541752 20108.50717
2.421 6.101436322 9139.95161 2.421 4.063535022 2783.52149 2.421 7.203576353 11338.42918
3.014 3.4049672 5100.640866 3.014 2.2726694 1556.778539 3.014 3.770140212 5934.200693
3.752 1.987458835 2977.213335 3.752 1.330344839 911.286215 3.752 2.04306203 3215.779635
4.672 1.150321425 1723.181494 4.672 0.756771709 518.3886204 4.672 1.126466957 1773.058991
5.816 0.540065081 809.017492 5.816 0.352022917 241.1356981 5.816 0.508609852 800.5519074
7.241 0.358084214 536.4101523 7.241 0.228796404 156.7255369 7.241 0.336493494 529.6407603
9.015 0.257702054 386.0376766 9.015 0.153762399 105.3272433 9.015 0.233477387 367.493407][1]
我尝试使用以下代码在gnuplot中生成聚类图：
set key top center
set xlabel "Dp (nm)"
set ylabel "Concentration (#/cm^3)"
set format y "%.1tE%+03T"
set autoscale
set logscale xy
set boxwidth 0.5 relative
set style data histogram
set style fill solid border -1
set style histogram clustered gap 1
plot "sample.dat" u (1000*$1):2 t 'data1' w boxes lc 2,\
"" u (1000*$4):5 t 'data2' w boxes lc 5
pause -1
然而，无论怎样，我都会获得一个赌注的情节。
我做错了什么？
提前致谢!!