Gnuplot：一个图的多图大小和缩放

Question

我有这个多重情节：

由以下代码生成：

set terminal pdf size 15,10
set output "graph.pdf"
set key off
set multiplot layout 5, 1 scale 1, 1
set style data histograms
set style histogram
set style fill solid border -1
set boxwidth 0.75
set yrange [0:178]
set ytics 50
set xtics offset 0,graph 0.01
set xtics font ",20"
set x2tics font ",20"
set ytics font ",20"
set tmargin 3
set bmargin 3
set style line 1 linetype -1 linewidth 3
set grid mxtics
set xtics (0.5 1,1.5 1,2.5 1,3.5 1,4.5 1,5.5 1,6.5 1,7.5 1,8.5 1,9.5 1,10.5 1,11.5 1,12.5 1,13.5 1,14.5 1,15.5 1,16.5 1,17.5 1,18.5 1,19.5 1,20.5 1,21.5 1,22.5 1,23.5 1,24.5 1,25.5 1,26.5 1,27.5 1,28.5 1,29.5 1,30.5 1 )
set tics out

plot 'outil1' every ::0::30 u 7:xtic(2) notitle lt rgb "blue" fillstyle pattern 2, 'ppm' every ::0::30 u 7 notitle lt rgb "red" fillstyle pattern 2, \
newhistogram at 0, 'outil1' every ::0::30 u 6:x2tic(1) notitle lt rgb "blue", 'ppm' every ::0::30 u 6 notitle lt rgb "red"
plot 'outil1' every ::30::60 u 7:xtic(2) notitle lt rgb "blue" fillstyle pattern 2, 'ppm' every ::30::60 u 7 notitle lt rgb "red" fillstyle pattern 2, \
newhistogram at 0, 'outil1' every ::30::60 u 6:x2tic(1) notitle lt rgb "blue", 'ppm' every ::30::60 u 6 notitle lt rgb "red"
plot 'outil1' every ::60::90 u 7:xtic(2) notitle lt rgb "blue" fillstyle pattern 2, 'ppm' every ::60::90 u 7 notitle lt rgb "red" fillstyle pattern 2, \
newhistogram at 0, 'outil1' every ::60::90 u 6:x2tic(1) notitle lt rgb "blue", 'ppm' every ::60::90 u 6 notitle lt rgb "red"
plot 'outil1' every ::90::120 u 7:xtic(2) notitle lt rgb "blue" fillstyle pattern 2, 'ppm' every ::90::120 u 7 notitle lt rgb "red" fillstyle pattern 2, \
newhistogram at 0, 'outil1' every ::90::120 u 6:x2tic(1) notitle lt rgb "blue", 'ppm' every ::90::120 u 6 notitle lt rgb "red"
plot 'outil1' every ::120::150 u 7:xtic(2) notitle lt rgb "blue" fillstyle pattern 2, 'ppm' every ::120::150 u 7 notitle lt rgb "red" fillstyle pattern 2, \
newhistogram at 0, 'outil1' every ::120::150 u 6:x2tic(1) notitle lt rgb "blue", 'ppm' every ::120::150 u 6 notitle lt rgb "red"

要生成绘图，您需要 outil1 data file 和 ppm data file

我遇到的问题是该情节是最后一个情节与前 4 个情节的大小不相等。在最后一个图中，抽动之间的距离更大，以使其适合整个画布。

有没有办法使最后一个情节与另一个情节对齐？例如，让 126 tic 与第 4 个图中的 96 tic 对齐。

谢谢。

Answer 1

绘制完四图后，可以将左边距固定为此时的值，根据图四到图五的不同比例调整右边距。

您可以按如下方式计算屏幕坐标中的左边距（即在 [0:1] 范围内，最左边的画布边缘为 0，最右边的画布边缘为 1）：

LMARGIN = GPVAL_TERM_SCALE * (0.0 + GPVAL_TERM_XMIN)/GPVAL_TERM_XSIZE

这里，GPVAL_TERM_SCALE 是一个因子，它仅在 gnuplot 5 中可用，但需要独立于使用的终端进行正确计算。使用 gnuplot 4.6 时。和pdfcairo 终端，此值为20。您可以在脚本中放置一个小的 if 子句来检查：

if (exists('GPVAL_TERM_SCALE')) SCALE = GPVAL_TERM_SCALE; else SCALE = 20

因此，脚本中的最后一个plot 命令应如下所示：

if (exists('GPVAL_TERM_SCALE')) SCALE = GPVAL_TERM_SCALE; else SCALE = 20
LMARGIN = SCALE * (0.0 + GPVAL_TERM_XMIN)/GPVAL_TERM_XSIZE
RMARGIN = SCALE * (0.0 + GPVAL_TERM_XMAX)/GPVAL_TERM_XSIZE

set lmargin screen LMARGIN
set rmargin screen LMARGIN + (17.0/32.0)*(RMARGIN - LMARGIN)

plot 'outil1' every ::120::150 u 7:xtic(2) notitle lt rgb "blue" fillstyle pattern 2, 'ppm' every ::120::150 u 7 notitle lt rgb "red" fillstyle pattern 2, \
newhistogram at 0, 'outil1' every ::120::150 u 6:x2tic(1) notitle lt rgb "blue", 'ppm' every ::120::150 u 6 notitle lt rgb "red"

我只是通过手动计算要绘制的范围来得到(17.0/32.0) 的因子。结果是