CODEWITHSUNDEEP
julia
user21096250
user21096250

Reputation:

How do I graph a line in Julia with an arrow on both sides?

Here is my code:

using MTH229
using Plots
f(x)=x
theme(:dark)
plot(f,-5,5,linewidth=5,c=:hotpink,legend=false,arrow=true)

Here is a picture of the output:

plot

How do I get the arrow to appear on both ends of the line instead of just one?

Upvotes: 3

Views: 423

Answers (2)

Przemyslaw Szufel
Przemyslaw Szufel

Reputation: 42214

The plot and plot! commands have an arrow parameter that in turn has a special option :both to have arrows on both ends. Hence you can just do

plot(f,-5,5,linewidth=5,c=:hotpink,legend=false,
     arrow=Plots.Arrow(:open, :both, 2.5, 2.0))

enter image description here

Upvotes: 2

Dan Getz
Dan Getz

Reputation: 18217

It's a bit of a hacky solution, but for the example in the question:

plot!([-4.99,-5],[f(-4.99), f(-5)],
  linewidth=5,c=:hotpink,legend=false,arrow=true)

adds the reverse arrow. Generalizing to any chart is pretty straight forward. The idea is to draw a line chart with a reverse direction, for just a tiny bit at the location of the reverse arrow and let Plot add the reverse arrow.

Chart with reverse arrow

Upvotes: 1

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