是否可以设置标签相对于gnuplot中的键的位置?

问题描述：

我的情节的本质是绝对标签实际上不起作用；我无法在y中限制范围，所以想知道是否有办法将我的标签文本包含在键中或相对于键放置(即在下方)

The nature of my plot is such that absolute labels don't really work; I can't restrict the range in y, so wondered if there was a way to either include my label text inside the key or have it placed relative to the key (i.e. below)

set term png enhanced size 1024,768
set title "{/=15 1D My title}\n - by me"
set xlabel "x"
set ylabel "y"
set label "V_0 = 10\n E = 1" #this is the bit I want to reposition
set out 'trial.png'
set xrange [-2.5:2.5]
set arrow from -2,-2000 to -2,2000 nohead size screen 0.025,30,45 ls 1
set arrow from 2,-2000 to 2,2000 nohead size screen 0.025,30,45 ls 1
plot 'data.dat'

PS:还有，还有一种更好的方法来使我的垂直线位于x = -2和x = 2吗?箭头解决方案再次也不理想，因为我的y范围通常大于或小于2000.

PS: also, is there a better way to get my vertical lines at x = -2 and x = 2? The arrows solution is again not ideal since my y range is often greater or smaller than 2000.

答

在gnuplot中，您可以使用不同的坐标系来设置箭头，标签，键和对象.坐标可以指定为

In gnuplot you can use different coordinate systems to set arrows, labels, key and objects. The coordinates may be specified as

first:左右轴上的值.
second:左右轴上的值.
graph:相对于轴内区域，0,0在左下方，1,1在右上方.
screen:相对于整个画布.
character:取决于所选的字体大小.

first: value on the left and bottom axes.
second: value on the right and top axes.
graph: relative to the area within the axes, 0,0 is bottom left and 1,1 is top right.
screen: relative to the entire canvas.
character: depends on the chosen font size.

以此，您可以通过以下方式设置箭头:

With this, you can set your arrows in the following way:

set arrow from first -2,graph 0 to first -2,graph 1 nohead ls 1
set arrow from first 2,graph 0 to first 2,graph 1 nohead ls 1

如果没有箭头，则无需设置size.

You don't need to set a size if you don't have an arrow head.

尽管我还不太了解您的标签问题，但是我敢肯定，您将通过以下有关不同坐标类型的信息来解决该问题:

Although I did not fully understand your label question, I'm sure you will solve it with these information about different coordinate types:

set label "V_0 = 10\n E = 1" right at graph 0.9, graph 0.8

是否可以设置标签相对于gnuplot中的键的位置?

相关推荐