When working with plots in Julia, it is often necessary to customize the appearance of the legend. One common customization is changing the size of the markers in the legend. In this article, we will explore three different ways to achieve this in Julia.
Option 1: Using Plots.jl
The first option is to use the Plots.jl package, which provides a high-level interface for creating and customizing plots in Julia. To change the size of the markers in the legend, we can use the `marker_size` argument in the `plot` function.
using Plots
# Create a scatter plot
x = 1:10
y = rand(10)
scatter(x, y, label="Data", marker_size=10)
This code snippet creates a scatter plot with markers of size 10 in the legend. You can adjust the `marker_size` argument to change the size according to your preference.
Option 2: Using PyPlot.jl
If you prefer to use the PyPlot backend in Julia, you can achieve the same result by directly modifying the legend properties using the `PyPlot` package.
using PyPlot
# Create a scatter plot
x = 1:10
y = rand(10)
scatter(x, y, label="Data")
# Get the current axes
ax = gca()
# Get the legend
legend = ax.get_legend()
# Set the marker size in the legend
for handle in legend.legendHandles
handle.set_markersize(10)
end
This code snippet creates a scatter plot and then modifies the marker size in the legend by iterating over the legend handles and setting the marker size using the `set_markersize` method. Again, you can adjust the marker size according to your preference.
Option 3: Using GR.jl
If you prefer to use the GR backend in Julia, you can achieve the desired result by modifying the legend properties using the `GR` package.
using GR
# Create a scatter plot
x = 1:10
y = rand(10)
scatter(x, y, label="Data")
# Get the current plot
plot = GR.current()
# Set the marker size in the legend
GR.setlegendmarkerattributes(plot, [GR.MARKERSIZE], [10])
This code snippet creates a scatter plot and then modifies the marker size in the legend using the `setlegendmarkerattributes` function from the `GR` package. The `MARKERSIZE` attribute is set to 10 to change the marker size in the legend.
After exploring these three options, it is clear that using the Plots.jl package provides the most straightforward and concise solution for changing the size of markers in the legend. It offers a high-level interface and simplifies the customization process. Therefore, Option 1 using Plots.jl is the recommended approach for this particular task.