使用相同的数据,有些调色板会出错,而有些则可以正常工作。
from bokeh.io import show, output_file
from bokeh.models import ColumnDataSource
from bokeh.plotting import figure
from bokeh.transform import factor_cmap
from bokeh.palettes import Spectral6, Dark2
output_file("colormapped_dots.html")
cats = ['A', 'A', 'B', 'B', 'C', 'C']
x = [5, 3, 4, 2, 4, 6]
y = x
factors = list(set(cats))
source = ColumnDataSource(data=dict(cats=cats, x=x, y=y))
这个可以正常工作,
p = figure()
p.circle('x', 'y', size=10,
color=factor_cmap('cats', palette=Spectral6, factors=factors),
source=source)
show(p)
这个会返回一个错误:
p = figure()
p.circle('x', 'y', size=10,
color=factor_cmap('cats', palette=Dark2, factors=factors),
source=source)
show(p)
ValueError: expected an element of Seq(Color), got {3: ['#1b9e77', '#d95f02', '#7570b3'], 4: ['#1b9e77', '#d95f02', '#7570b3', '#e7298a'], 5: ['#1b9e77', '#d95f02', '#7570b3', '#e7298a', '#66a61e'], 6: ['#1b9e77', '#d95f02', '#7570b3', '#e7298a', '#66a61e', '#e6ab02'], 7: ['#1b9e77', '#d95f02', '#7570b3', '#e7298a', '#66a61e', '#e6ab02', '#a6761d'], 8: ['#1b9e77', '#d95f02', '#7570b3', '#e7298a', '#66a61e', '#e6ab02', '#a6761d', '#666666']}
这些调色板有什么区别,我们如何使用“Dark2”调色板?
Dark2_3
也可以使用。但是,调色板组也被收集到字典中,因为有时按调色板大小索引某些内容很方便。 - bigreddot