gnuplot-如何缩放xyrange以不考虑热图图中的小z [英] Gnuplot - how to scale xyrange to not take into account small z in heatmap plot

问题描述

我有一个数据文件 _FullWV.dat ，我希望Gnuplot能够如果在所需区域z ＜z，则自动缩放xyrange. 10 ^(-8)，有什么办法吗?

I have a data file _FullWV.dat and I want Gnuplot to automatically scale xyrange if outside the wanted region z < 10^(-8), is there any way to make it?

图是此处.

使用过的脚本在下面:

reset
set terminal pngcairo size 800,800
set output '3d-polar.png'
set lmargin at screen 0.05
set rmargin at screen 0.85
set bmargin at screen 0.1
set tmargin at screen 0.9

set pm3d map
unset key
set multiplot

stats '_FullWV.dat' using 3
max(a,b) = (a>b) ? a : b

Z_MAX = max(-STATS_min, STATS_max)

set parametric
set grid xtics ytics

set angles degree
set autoscale xfix
set autoscale yfix
#set zrange [-Z_MAX : Z_MAX]
set cbrange [-Z_MAX : Z_MAX]

set palette model RGB defined ( 0"black", 1"white", 2"grey")
splot '_FullWV.dat' u ($2*cos($1)):($2*sin($1)):3
unset multiplot

推荐答案

代码

set size ratio -1
splot '_FullWV.dat' u (abs($3)<1e-5 ? NaN : $2*cos($1)):($2*sin($1)):3

1e-8太小了，它几乎没有超出原始范围.

1e-8 was too small, it cut almost nothing from the original range.

abs($3)<1e-5 ? NaN : $2*cos($1)

如果z(第3列)在-1e-5和1e-5之间，请将x保留为undefined(非数字).如果未定义x，则即使定义了y和z，也不会显示任何点.

If z (3rd column) is between -1e-5 and 1e-5, leave x undefined (Not a Number). If x is undefined, no point will be displayed, even if y and z are defined.

如果z超出此范围，则将x定义为$2*cos($1).

If z is outside this range, define x as $2*cos($1).

请注意，对于pm3d，至少需要2个连续的值才能显示一个点.这意味着自动缩放会考虑1个单独的值，但不会显示.

Note that for pm3d, at least 2 consecutive values are needed for a point to be displayed. It means that 1 lone value will be take into account by autoscale, but will not be displayed.

set size ratio -1

表示x比例尺上的一个单位将与y比例尺上的一个单位一样大:否则，圆形可能显示为椭圆.

means that one unit on the x scale will be as big as one unit on the y scale : a circle might be displayed as an ellipse otherwise.

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