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Frontmatter

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Author 1

Plots.jl click input

Click somewhere on this graph:

👀 Reading hidden code
233 μs
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@initially [5,5] @bind x0 plotclicktracker(linepoint(x0))
Deprecated, use `AbstractPlutoDingetjes.Display.published_to_js(x)` instead of `PlutoRunner.publish_to_js(x)`.
 12.0 s
Error message

UndefVarError: x0 not defined

Stack trace

Here is what happened, the most recent locations are first:

  1. from This cell: line 1
    x0
x0
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---
linepoint (generic function with 1 method)
function linepoint(click_coordinate)
p = plot(1:10)
scatter!(p, click_coordinate[1:1], click_coordinate[2:2])
end
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601 μs

Why is this special? Because normally, the input (@bind) and output live in two separate cells:

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273 μs
@bind x html"<input type=range>"
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279 ms
missing
sqrt(x)
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18.0 μs

But in our interactive plot, the input and output are inside the same cell. To achieve this, we need a couple of tricks: a click tracker wrapper, a self-referencing cell and the @initially macro. Let's talk about those one by one:

Click tracker

TUTORIAL WORK IN PROGRESS

👀 Reading hidden code
432 μs
COOL_PLOT (generic function with 1 method)
function COOL_PLOT(q0)
p = plot(1:10)
scatter!(p, q0[1:1], q0[2:2])
return p
end
👀 Reading hidden code
624 μs

The third step is to write a function that:

  • takes a click coordinate (a vector [x, y]) as input, and

  • returns a plot.

It's up to you to use this coordinate in a creative way!

👀 Reading hidden code
486 μs

Necessary functions

You can copy these cells into your notebook by selecting them (start dragging a selection rectangle from inbetween two cells), and dragging them into another notebook.

👀 Reading hidden code
220 μs
plotclicktracker (generic function with 1 method)
👀 Reading hidden code
6.2 ms
intially_function (generic function with 1 method)
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10.7 ms

You can also use ingredients to load this notebook into another notebook.

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226 μs

Packages

(We only need Plots.jl)

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211 μs
begin
import Pkg
Pkg.activate(mktempdir())
Pkg.add([
Pkg.PackageSpec(name="Plots", version="1.6-1"),
])
using Plots
end
👀 Reading hidden code
❔
  Activating new project at `/tmp/jl_hlmNEB`
    Updating registry at `~/.julia/registries/General.toml`
   Resolving package versions...
    Updating `/tmp/jl_hlmNEB/Project.toml`
  [91a5bcdd] + Plots v1.40.10
    Updating `/tmp/jl_hlmNEB/Manifest.toml`
  [66dad0bd] + AliasTables v1.1.3
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7.3 s