📂Julia

Obtaining Colors with Values from 0 to 1 in the Julia Color Scheme

Overview

To obtain colors in the range from 0 to 1 in Julia’s color scheme, use the get function¹. Although this function originally exists in Base, it has been overloaded through using ColorSchemes.

Code

The color scheme used in the example is colorschemes[:plasma].

colorschemes[:plasma]

By inputting a value between 0 and 1 as the second argument to the get function, you can obtain the exact color at that position in the continuous color scheme.

[get(colorschemes[:plasma], x) for x in [.3, .7, .1, .5, .9]]

Meanwhile, since the get function originally accepts an array of real numbers and returns an array of colors, it can be used as follows without necessarily broadcasting. In a way, the interface that allows for obtaining a single color even with a scalar input could be considered an exceptional feature.

get(colorschemes[:plasma], .2:.2:1)

Full Code

using ColorSchemes

colorschemes[:plasma]
[get(colorschemes[:plasma], x) for x in [.3, .7, .1, .5, .9]]
get(colorschemes[:plasma], .2:.2:1)

Environment

• OS: Windows
• julia: v1.10.0