"""
Points with varying transparency
================================

Points can be plotted with different transparency levels by passing in an array
argument to the ``transparency`` parameter of :meth:`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()