Convenient methods to plot horizontal and vertical lines #670
Description
Description of the desired feature
matplotlib provides two methods, hlines and vlines, for plotting horizontal and vertical lines.
In PyGMT, we can plot any lines using the plot() method. However, for plotting horizontal and vertical lines, we have to prepare the input x and y arrays, which is not elegant.
Expected syntax:
Figure.hlines(y, xmin=None, xmax=None, pen=None, label=None)
Figure.vlines(x, ymin=None, ymax=None, pen=None, label=None)An expected hlines example:
import pygmt
fig = pygmt.Figure()
fig.basemap(region=[0, 10, 0, 10], projection="X10c/10c", frame=True)
fig.hlines(1, label="line1")
fig.hlines([2, 3], pen="1p,blue", label="line2")
fig.hlines([4, 5], xmin=2, xmax=8, pen="1p,red", label="line3")
fig.hlines([6, 7], xmin=[2, 3], xmax=[8, 9], pen="1p,lightblue", label=["line4", "line5"])
fig.legend()
fig.show()Expected output:
The above script is equivalent to the following script:
import pygmt
fig = pygmt.Figure()
fig.basemap(region=[0, 10, 0, 10], projection="X10c/10c", frame=True)
fig.plot(x=[0, 10], y=[1, 1], label="line1")
fig.plot(x=[0, 10], y=[2, 2], pen="1p,blue", label="line2")
fig.plot(x=[0, 10], y=[3, 3], pen="1p,blue")
fig.plot(x=[2, 8], y=[4, 4], pen="1p,red", label="line3")
fig.plot(x=[2, 8], y=[5, 5], pen="1p,red")
fig.plot(x=[2, 8], y=[6, 6], pen="1p,lightblue", label="line4")
fig.plot(x=[3, 9], y=[7, 7], pen="1p,lightblue")
fig.legend()
fig.show()Are you willing to help implement and maintain this feature? Yes