Gnuplot-如何获得没有任何意义的图形? (我只希望有轴，标题以及x-和y-标签) [英] Gnuplot - how can I get a figure with no point on it ? (I want to have only the axes, the title and the x- and y- labels)

问题描述

我必须制作一个视频，展示一些数量随时间的变化.我正在用gnuplot创建图像，并将它们组装成电影.我在生成两个第一张图像时遇到麻烦:第一张图像应该上面没有点(应该只显示图形的标题，x和y轴以及轴的标签)，第二张图像应该只有一个点.

I have to create a video presenting the evolution of some quantities as functions of time. I am creating images with gnuplot and I assemble them to make a movie. I am getting trouble generating the two first images: the first image is supposed to have no point on it (it is supposed to show only the title of the graph, the x and y axes and the labels of the axes) and the second one is supposed to have one single point on it.

• 是否可以使用gnuplot创建一个不包含任何数据的图形?

• Is it possible to create a graph containing no data on it with gnuplot?

是否可以使用gnuplot使用输入文件创建包含一个点的图形?输入文件包含:

Is it possible to create a graph containing one single point with gnuplot using an input file? The input file contains:

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预先感谢您的回答，

朱利安

推荐答案

要绘制一个空图，只需绘制一个完全未定义的函数，如

To plot an empty graph, just plot a completely undefined function like

plot NaN

这里的主要问题是，由于没有有效点，因此自动缩放失败.您必须给出一个固定的xrange和yrange才能得到一个图:

The main issue here is, that the autoscaling fails since there are no valid points. You must give a fixed xrange and yrange to get a plot:

set xrange [0:1]
set yrange [0:1]
plot NaN notitle

绘制单个点可以很好地使用

Plotting a single point works fine using

plot 'file.dat' using 1:2 with points

您将收到警告，提示Warning: empty x range [0:0], adjusting to [-1:1]和Warning: empty y range [15:15], adjusting to [14.85:15.15]，但您会看到一个图.要删除警告，您必须再次提供固定的xrange和yrange.

You'll get warnings saying Warning: empty x range [0:0], adjusting to [-1:1] and Warning: empty y range [15:15], adjusting to [14.85:15.15], but you get a plot. To remove the warnings, you must again provide a fixed xrange and yrange.

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