Gadfly.jl Display Actual Values on Chart

Question

I'm trying to determine if it's possible to display the underlying data points on a Gadfly chart. I know that I can display the labels associated with a particular point, but how can I show the actual values on the chart, itself?

For example, from the Gadfly documentation, let's say I have this chart:

plot(x=rand(10), y=rand(10))

How can I display the resulting values in the x and y vectors on the chart itself?

David P. Sanders · Accepted Answer · 2015-10-25T23:07:59.563

4

Actually, it's easy to get a string representation, e.g. string(3).

How about the following:

using Gadfly

N = 10
xx = rand(1:10, N)  # N random integers between 1 and 10
yy = rand(1:10, N)

labels = map(string, zip(x,y))

plot(x=xx, y=yy, label=labels, Geom.label, Geom.point)

This gives something like the following:

edited Oct 25 '15 at 23:07

answered Oct 25 '15 at 18:48

David P. Sanders

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Cool, thank you. I forgot about map(). It's perfect here. – Jeremy McNees Oct 25 '15 at 19:04
I was doing too much work: `labels = map(string, zip(xx, yy))`! – David P. Sanders Oct 25 '15 at 23:06

score 1 · Answer 2 · answered Oct 25 '15 at 17:59

One way to do this is to feed the values into Gadfly via a labels string vector:

label_vec = ["4", "4", "7", "7", "9", "1", "8", "10", "11", "2"]

plot(x=rand(10), y=rand(10), Labels = label_vec, Geom.label)

It's a pain to parse ints/floats into strings though, it would be nice if you could feed them directly into Gadfly as ints/floats.

Does anyone have a better way?

Gadfly.jl Display Actual Values on Chart

2 Answers2