CODEWITHSUNDEEP
gnuplot
Mobile Ben
Mobile Ben

Reputation: 7331

Converting plot X, Y to location to draw arrow/line

I have a bunch of data that I'm plotting as point plots. The data is simply a column for X and a column for Y. The catch here though is this is plotted using axes x2y2.

The x1y1 is used for a histogram. The X axis is the same range for both plots.

I know how to derive the X coordinate, but am wondering if there is an easy way to determine the Y value to use to draw an arrow. I want to draw an arrow callout for an arbitrary point on the point plot.

y1 and y2 are independent.

Upvotes: 3

Views: 271

Answers (1)

Christoph
Christoph

Reputation: 48390

The coordinates for drawing the arrow can refer to different coordinate systems (first, second, character, screen, and graph, see help coordinates).

So, to draw an arrow e.g. from the top-middle of the plot (graph 0.5, graph 1) to x2 = 1, y2 = 2 (second 1, second 2) you would write

set arrow from graph 0.5, graph 1 to second 1, second 2 head

Upvotes: 1

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