pysal.viz.splot.mapping.
value_by_alpha_cmap
(x, y, cmap='GnBu', revert_alpha=False, divergent=False)[源代码]¶按alpha rgba值计算值
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实例
进口
>>> from pysal.lib import examples
>>> import geopandas as gpd
>>> import matplotlib.pyplot as plt
>>> import matplotlib
>>> import numpy as np
>>> from pysal.viz.splot.mapping import value_by_alpha_cmap
加载示例数据
>>> link_to_data = examples.get_path('columbus.shp')
>>> gdf = gpd.read_file(link_to_data)
>>> x = gdf['HOVAL'].values
>>> y = gdf['CRIME'].values
创建rgba值
>>> rgba, _ = value_by_alpha_cmap(x, y)
创建发散的rgba并更改颜色映射
>>> div_rgba, _ = value_by_alpha_cmap(x, y, cmap='seismic', divergent=True)
使用还原的alpha值创建rgba值
>>> rev_rgba, _ = value_by_alpha_cmap(x, y, cmap='RdBu', revert_alpha=True)
( Source code )