python plotnine：如何改变色阶

Question

我有下面的图和下面的代码，但我保留了颜色图例，它没有很好地分开，我无法从图中很好地分辨出差异。我想知道如何将颜色条从例如非常浅的绿色更改为深绿色。所以比较分离。我尝试添加 p9.scale_fill_gradient(low="green",high="darkgreen") ，但它没有用。

import plotnine as p9
pretty_spk = p9.ggplot(data = data_fully_merged, mapping = p9.aes(x='index', y='value', colour = facet_var))+ p9.geom_point(alpha = alpha_scale)

pretty_spk = pretty_spk + p9.facet_grid("gender~outcome")
title_string = season_str.upper() + " " + facet_var + " " + features_str + " curves facetted by gender and outcome" 
pretty_spk = pretty_spk + p9.geom_smooth(method = 'loess') + p9.ggtitle(title_string) + p9.scale_fill_gradient(low="green",high="darkgreen")

Answer 1

对于柱，它是 scale_fill_gradient，但对于点，您使用 scale_color_gradient。不是每个人都知道你所说的更多分离的色标是什么意思。也许你可以从下面开始：

from sklearn.datasets import load_iris
import pandas as pd

data = load_iris()
df = pd.DataFrame(data.data, columns=['sepal.length','sepal.width','petal.length','petal.width'])
df.head()

import plotnine as p9
(p9.ggplot(data = df, mapping = p9.aes(x='sepal.length', y='sepal.width', colour = 'petal.length'))+ 
 p9.geom_point()+p9.scale_color_gradient(low="lightgreen",high="darkgreen"))

python plotnine：如何改变色阶

python plotnine: how to change color scale

python

visualization

ggplot2

plotnine