如何修改对数刻度图中的偏移

时间:2019-06-15 17:37:33

标签: gnuplot

我想在直方图中进行几行堆叠,如下面的

Gnuplot Histogram Cluster (Bar Chart) with One Line per Category

我选择了第一个解决方案,但我有一些不同之处,因为我的x轴是对数刻度,直方图的位置将错误。

如果我在没有对数刻度的情况下进行绘图,那将是正确的。 without log 但是,如果我使用log,则不需要该图。 log-version

这是我的数据和代码

cat shared_improve.txt
#   N       Sort         Build
2       0.0415      0.0203
4       0.0422      0.0231
8       0.0426      0.0217
16      0.0422      0.0206
32      0.0436      0.0214
64      0.0431      0.0238
128     0.0687      0.0276
256     0.3207      0.0277
512     0.0434      0.0318
1024    0.3241      0.0498
2048        0.2156      0.0756
4096        0.2206      0.1104
8192        0.5088      0.1803
16384       0.5429      0.3554
32768       0.2683      0.6023
65536       0.2916      1.1679
131072      0.2424      1.9058
262144      0.2779      2.1457
524288      0.3869      3.8198
1048576     0.4464      7.6622
2097152     0.6034      15.146
4194304     0.9236      30.152
8388608     1.6020      61.129
16777216    2.8925      120.464     
33554432    5.5434      239.922
cat global_improve.txt 
#   N       Sort        Build
2       0.0747      0.0201
4       0.0702      0.0170
8       0.0880      0.0260
16      0.0608      0.0162
64      0.0623      0.0186
128     0.0659      0.0211
256     0.3593      0.0212
512     0.0567      0.0240
1024        0.3552      0.3038
2048        0.5106      0.0370
4096        0.5349      0.0590
8192        0.5215      0.0920
16384       0.5965      0.1671
32768       0.5179      0.2886
65536       0.5216      0.5452
131072      0.2529      1.2914
262144      0.5777      2.4295
524288      0.7484      4.3674
1048576     0.8304      8.5765
2097152     1.1448      17.0458
4194304     1.8410      36.0509
8388608     3.1218      67.5819
16777216    5.8081      138.0298

reset

set terminal png font " Times_New_Roman,12 "
set output "test.png"

set logscale x 2
set xtics 2
set xtics rotate out
set style fill solid border -1

set boxwidth 0.3/2
dx=0.5/2
offset=-0.1
set yrange[0:0.5]

plot  [1:16]'shared_improve.txt' using ($1+offset):($2+$3) title "sort shared" linecolor rgb "#cc0000" with boxes  ,\
    ''         using ($1+offset):3 title "build shared" linecolor rgb "#ff0000" with boxes ,\
      'global_improve.txt' using ($1+offset+dx):($2+$3) title "sort global" linecolor rgb "#00cc00" with boxes ,\
    ''         using ($1+offset+dx):3  title "build global" linecolor rgb "#00ff00" with boxes

1 个答案:

答案 0 :(得分:0)

如果绘制框并自己设置偏移量,则必须考虑对数刻度。在那里,要获得恒定的偏移量,您不必添加或减去值,而只需乘以或除以某个值即可。

代码:

reset

set terminal png font "Times_New_Roman,12"
set output "test.png"
set key top left

set logscale x 2
set xtics 2
set xtics rotate out
set style fill solid border -1

set boxwidth 0.3
offset=1.15

plot  [1.1:1500] \
    'shared_improve.txt' u ($1/offset):($2+$3) w boxes lc rgb "#cc0000" ti "sort shared", \
    '' u ($1/offset):3 w boxes lc rgb "#ff0000" ti "build shared", \
    'global_improve.txt' u ($1*offset):($2+$3) w boxes lc rgb "#00cc00" ti "sort global",\
    '' u ($1*offset):3 w boxes lc rgb "#00ff00" ti "build global" 
set output

结果:

(某些32位值是(un?)故意丢失的?)

enter image description here