Update syntax for loading sample datasets in gallery examples (#1749)

Author: michaelgrund

examples/gallery/histograms/blockm.py

@@ -10,7 +10,7 @@
 import pygmt
 
 # Load sample data
-data = pygmt.datasets.load_japan_quakes()
+data = pygmt.datasets.load_sample_data(name="japan_quakes")
 # Select only needed columns
 data = data[["longitude", "latitude", "depth_km"]]
 

examples/gallery/histograms/rose.py

@@ -10,7 +10,7 @@
 
 # Load sample compilation of fracture lengths and azimuth as
 # hypothetically digitized from geological maps
-data = pygmt.datasets.load_fractures_compilation()
+data = pygmt.datasets.load_sample_data(name="fractures")
 
 fig = pygmt.Figure()
 

examples/gallery/images/track_sampling.py

@@ -18,7 +18,7 @@
 
 # Load sample grid and point datasets
 grid = pygmt.datasets.load_earth_relief()
-points = pygmt.datasets.load_ocean_ridge_points()
+points = pygmt.datasets.load_sample_data(name="ocean_ridge_points")
 # Sample the bathymetry along the world's ocean ridges at specified track
 # points
 track = pygmt.grdtrack(points=points, grid=grid, newcolname="bathymetry")