Rename a specific tick label

Q&A PyGMT Q&A
1

Hello,

import pygmt

fig = pygmt.Figure()
with fig.subplot(nrows=1,ncols=1,subsize=("16c", "10c")):
    pen = "1.5p"
    with fig.set_panel(panel=0):       
        fill = "skyblue"
        offset=0.6
        colr='yellow'
        fig.basemap(region=[3, 18, 0, 8], frame=['px5f5g5+u Station'])
        fig.plot(x=5+offset, y=5, style="b1c", fill=fill, pen=pen)
        fig.plot(x=5-offset, y=3,  style="b1c", fill=colr,pen=pen)
        fig.plot(x=10+offset, y=6, style="b1c", fill=fill, pen=pen)
        fig.plot(x=10-offset, y=7,  style="b1c", fill=colr,pen=pen)       
        fig.plot(x=15+offset, y=2, style="b1c", fill=fill, pen=pen)
        fig.plot(x=15-offset, y=3,  style="b1c", fill=colr,pen=pen)      
fig.show()

Capture

How can I rename the last tick label to “20 Station” instead of “15 Station”.

Thank you

2

You can use Figure.text() to add these labels.

3

Thank you @seisman

fig.text(text="20 Station", x=15, y=0)

What will be the y value in this case of tick label?

4

using custom ticks mechanism of gmt:

import pygmt

#The coord is the location of the desired annotation, tick, or grid-line,
#whereas type is a string composed of letters from
#a (annotation), i interval annotation, f frame tick, and g gridline.
#You must use either a or i within one file; no mixing is allowed.
#The coordinates should be arranged in increasing order.
#If label is given it replaces the normal annotation based on the coord value.

xannots = '''5 ag 5 Station
10 ag 10 Station
15 ag 20 Station
'''

with open('xannots.txt', 'w') as f:
    f.writelines(xannots)

fig = pygmt.Figure()
with fig.subplot(nrows=1,ncols=1,subsize=("16c", "10c")):
    pen = "1.5p"
    with fig.set_panel(panel=0):
        fill = "skyblue"
        offset=0.6
        colr='yellow'
        fig.basemap(region=[3, 18, 0, 8], frame=['pxcxannots.txt'])
        fig.plot(x=5+offset, y=5, style="b1c", fill=fill, pen=pen)
        fig.plot(x=5-offset, y=3,  style="b1c", fill=colr,pen=pen)
        fig.plot(x=10+offset, y=6, style="b1c", fill=fill, pen=pen)
        fig.plot(x=10-offset, y=7,  style="b1c", fill=colr,pen=pen)
        fig.plot(x=15+offset, y=2, style="b1c", fill=fill, pen=pen)
        fig.plot(x=15-offset, y=3,  style="b1c", fill=colr,pen=pen)

fig.savefig('custom_xticks.png', show=True)
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