如何在 Gnuplot 中创建类似 Excel 的平滑？
How to create an Excel-like smoothing in Gnuplot?
我得到的数据有很多数据点，没有确定的方程式或者只适合很多尖锐的数据，我只想连接所有这些并使用 Gnuplot 创建一个平滑的图形但是，没有什么可以使情节成为与 MS Excel 制作的一样流畅。如何创建类似 Excel 的平滑图？
我使用的 Gnuplot 设置：
set terminal postscript eps enhanced font "FreeSerif,14" size 3.0in,1.7in
set output 'fig4a.eps'
set encoding iso_8859_1
set border linewidth .5
set xlabel '{/FreeSerif-BoldItalics d} {/FreeSerif-Bold ({5})}'
set ylabel '{/FreeSerif-Bold {/Symbol D}{/FreeSerif-Bold C}_q (e/V)}'
set xrange [-8:8]
set xtics -8,2,8
set mxtics 2
set yrange [0:0.3]
set ytics 0,0.1,0.3
set mytics 2
set key at 1.42,-0.24 reverse
set style line 1 linewidth 0.5
plot for [n=2:4] 'fig4a.dat' u 1:n smooth cspline frequency w lines ls 1
replot
quit
这些是我的图（设计有点不同，因为我还在解决平滑问题）
Excel
Gnuplot（样条曲线、cspline、mcspline（每个都产生相似的输出））
一些选定的数据点
使用：plot 'fig4a.dat' u 1:4 smooth cspline notitle w lines ls 1
输出：
数据点：
-8.09808994 -3.53E-07
-7.99108994 -1.02E-05
-7.88508994 -0.000162606
-7.77908994 -0.001377785
-7.67308994 -0.00552213
-7.56708994 -0.00499697
-7.46108994 0.0326345
-7.35408994 0.1168893
-7.24808994 0.186241
-7.14208994 0.205997
-7.03608994 0.191836
-6.93008994 0.151735
-6.82308994 0.106245
-6.71708994 0.086542
-6.61108994 0.104821
-6.50508994 0.155378
-6.39908994 0.192769
-6.29208994 0.17085
-6.18608994 0.133063
-6.08008994 0.093566
-5.97408994 0.091761
-5.86808994 0.171249
-5.76108994 0.20373
-5.65508994 0.139635
-5.54908994 0.117342
-5.44308994 0.142744
-5.33708994 0.111295
-5.23008994 0.047449
-5.12408994 0.017428002
-5.01808994 0.025381005
-4.91208994 0.07760701
-4.80608994 0.177550019
-4.69908994 0.221490023
-4.59308994 0.130530012
-4.48708994 0.022438001
-4.38108994 -0.004862101
-4.27508994 0.022498
-4.16908994 0.079377
-4.06208994 0.14604
-3.95608994 0.19269
-3.85008994 0.19097
-3.74408994 0.125244
-3.63808994 0.05851
-3.53108994 0.053151
-3.42508994 0.063857
-3.31908994 0.05646
-3.21308994 0.05375
-3.10708994 0.06817
-3.00008994 0.081894
-2.89408994 0.070248
-2.78808994 0.055941
-2.68208994 0.0445004
-2.57608994 0.029018
-2.46908994 0.034651
-2.36308994 0.05154
-2.25708994 0.051322
-2.15108994 0.053645993
-2.04508994 0.079479713
-1.93808994 0.110223123
-1.83208994 0.12952024
-1.72608994 0.123183
-1.62008994 0.100336
-1.51408994 0.0878377
-1.40708994 0.08143
-1.30108994 0.11223
-1.19508994 0.167822
-1.08908994 0.157034
-0.98308994 0.107838
-0.87708994 0.09736
-0.77008994 0.10481
-0.66408994 0.12359
-0.55808994 0.17554
-0.45208994 0.21844
-0.34608994 0.20774
-0.23908994 0.169731
-0.13308994 0.143784
-0.02708994 0.134956
0.07891006 0.136358
0.18491006 0.115993
0.29191006 0.1022772
0.39791006 0.130636
0.50391006 0.137051
0.60991006 0.108013
0.71591006 0.108763
0.82291006 0.147532
0.92891006 0.1658
1.03491006 0.160103
1.14091006 0.1589476
1.24691006 0.1353571
1.35391006 0.09032325
1.45991006 0.05464951
1.56591006 0.03587591
1.67191006 0.031322905
1.77791006 0.021403117
1.88491006 0.00489071
1.99091006 0.002355969
您可以使用
设置样条曲线中显示的点数
set sample 1000
我得到的数据有很多数据点，没有确定的方程式或者只适合很多尖锐的数据，我只想连接所有这些并使用 Gnuplot 创建一个平滑的图形但是，没有什么可以使情节成为与 MS Excel 制作的一样流畅。如何创建类似 Excel 的平滑图？
我使用的 Gnuplot 设置：
set terminal postscript eps enhanced font "FreeSerif,14" size 3.0in,1.7in
set output 'fig4a.eps'
set encoding iso_8859_1
set border linewidth .5
set xlabel '{/FreeSerif-BoldItalics d} {/FreeSerif-Bold ({5})}'
set ylabel '{/FreeSerif-Bold {/Symbol D}{/FreeSerif-Bold C}_q (e/V)}'
set xrange [-8:8]
set xtics -8,2,8
set mxtics 2
set yrange [0:0.3]
set ytics 0,0.1,0.3
set mytics 2
set key at 1.42,-0.24 reverse
set style line 1 linewidth 0.5
plot for [n=2:4] 'fig4a.dat' u 1:n smooth cspline frequency w lines ls 1
replot
quit
这些是我的图（设计有点不同，因为我还在解决平滑问题）
Excel
Gnuplot（样条曲线、cspline、mcspline（每个都产生相似的输出））
一些选定的数据点
使用：plot 'fig4a.dat' u 1:4 smooth cspline notitle w lines ls 1
输出：
数据点：
-8.09808994 -3.53E-07
-7.99108994 -1.02E-05
-7.88508994 -0.000162606
-7.77908994 -0.001377785
-7.67308994 -0.00552213
-7.56708994 -0.00499697
-7.46108994 0.0326345
-7.35408994 0.1168893
-7.24808994 0.186241
-7.14208994 0.205997
-7.03608994 0.191836
-6.93008994 0.151735
-6.82308994 0.106245
-6.71708994 0.086542
-6.61108994 0.104821
-6.50508994 0.155378
-6.39908994 0.192769
-6.29208994 0.17085
-6.18608994 0.133063
-6.08008994 0.093566
-5.97408994 0.091761
-5.86808994 0.171249
-5.76108994 0.20373
-5.65508994 0.139635
-5.54908994 0.117342
-5.44308994 0.142744
-5.33708994 0.111295
-5.23008994 0.047449
-5.12408994 0.017428002
-5.01808994 0.025381005
-4.91208994 0.07760701
-4.80608994 0.177550019
-4.69908994 0.221490023
-4.59308994 0.130530012
-4.48708994 0.022438001
-4.38108994 -0.004862101
-4.27508994 0.022498
-4.16908994 0.079377
-4.06208994 0.14604
-3.95608994 0.19269
-3.85008994 0.19097
-3.74408994 0.125244
-3.63808994 0.05851
-3.53108994 0.053151
-3.42508994 0.063857
-3.31908994 0.05646
-3.21308994 0.05375
-3.10708994 0.06817
-3.00008994 0.081894
-2.89408994 0.070248
-2.78808994 0.055941
-2.68208994 0.0445004
-2.57608994 0.029018
-2.46908994 0.034651
-2.36308994 0.05154
-2.25708994 0.051322
-2.15108994 0.053645993
-2.04508994 0.079479713
-1.93808994 0.110223123
-1.83208994 0.12952024
-1.72608994 0.123183
-1.62008994 0.100336
-1.51408994 0.0878377
-1.40708994 0.08143
-1.30108994 0.11223
-1.19508994 0.167822
-1.08908994 0.157034
-0.98308994 0.107838
-0.87708994 0.09736
-0.77008994 0.10481
-0.66408994 0.12359
-0.55808994 0.17554
-0.45208994 0.21844
-0.34608994 0.20774
-0.23908994 0.169731
-0.13308994 0.143784
-0.02708994 0.134956
0.07891006 0.136358
0.18491006 0.115993
0.29191006 0.1022772
0.39791006 0.130636
0.50391006 0.137051
0.60991006 0.108013
0.71591006 0.108763
0.82291006 0.147532
0.92891006 0.1658
1.03491006 0.160103
1.14091006 0.1589476
1.24691006 0.1353571
1.35391006 0.09032325
1.45991006 0.05464951
1.56591006 0.03587591
1.67191006 0.031322905
1.77791006 0.021403117
1.88491006 0.00489071
1.99091006 0.002355969
您可以使用
设置样条曲线中显示的点数set sample 1000