在许多半径不同的点周围画一个圆 [英] drawing a circle around many points with different radius

问题描述

我可以用类似流动的命令围绕给定点(x，y)画一个圆(例如，点在(X = 5，Y = 7)且圆的半径为R = 2.73):/p>

I can draw a circle around a given point (x,y) with a command like flowing (here for example point is at (X=5,Y=7) and the circle have a radius R=2.73):

set object 1 circle at 5,7 size first 2.73 fc rgb "navy"

现在，如果我有很多点(在txt文件中，每行都是"x y")，并且我想在每个点周围绘制一个具有不同指定半径的圆.我是否应该为每个点i重复命令将对象设置为以Xi，Yi大小的第一个Ri fc rgb海军"盘旋?

Now, if I have many points (in a txt file where each line is "x y") and I want to draw a circle around each point with different specified radius. Should I repeat the command "set object i circle at Xi,Yi size first Ri fc rgb "navy"" for each point i ?!

推荐答案

您似乎想使用 with circle 选项.如果您有一个三列(x y半径)的数据文件，则以下命令将在每个点上绘制半径为半径的圆:

It looks like you may want to use the with circles option. If you have a data file with three columns (x y radius), the following command will plot circles with radii from the file at each point:

 plot 'datafile' u 1:2:3 with circles

http://gnuplot.sourceforge.net/demo/circles.html

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