Points with varying transparency

Points can be plotted with different transparency levels by passing in an array argument to the transparency parameter of pygmt.Figure.plot.

import numpy as np
import pygmt
from pygmt.params import Axis, Frame

# prepare the input x and y data
x = np.arange(0, 105, 5)
y = np.ones(x.size)
# transparency level in percentage from 0 (i.e., opaque) to 100
transparency = x

fig = pygmt.Figure()
fig.basemap(
    region=[-5, 105, 0, 2],
    frame=Frame(
        axes="WSrt",
        xaxis=Axis(annot=True, tick=True, label="Transparency level", unit="%"),
    ),
    projection="X15c/6c",
)
fig.plot(x=x, y=y, style="c0.6c", fill="blue", pen="1p,red", transparency=transparency)
fig.show()