pandas 中的分组散点图
Grouped scatter plot in pandas
假设我在数据框中有这个 table：
DATE SUNHOUR YEAR
--- ---------- --------- ------
281 2018-10-09 11.1 2018
29 2018-01-30 6.5 2018
266 2018-09-24 6.2 2018
115 2018-04-26 13.4 2018
69 2018-03-11 7.3 2018
158 2019-06-08 13.7 2019
287 2019-10-15 8.5 2019
177 2019-06-27 15.9 2019
136 2019-05-17 11.5 2019
59 2019-03-01 10.1 2019
这会给我一个散点图：
df.plot.scatter(x='DATE', y='SUNHOUR')
现在，当我查看 at the documentation 时，我读到参数 c 可以采用 列名称或位置，其值将用于根据以下条件为标记点着色颜色图。 所以我认为每年都有不同的颜色：
df.plot.scatter(x='DATE', y='SUNHOUR', c='YEAR')
但是这个returns:
ValueError: 'c' argument must be a color, a sequence of colors, or a sequence of numbers, not ['2018' '2018' '2018' '2018' '2018' '2019' '2019' '2019' '2019' '2019']
我错过了什么？
根据文档：
c : str, int or array_like, optional
The color of each point. Possible values are:
* A single color string referred to by name, RGB or RGBA code, for instance ‘red’ or ‘#a98d19’.
* A sequence of color strings referred to by name, RGB or RGBA code, which will be used for each point’s color recursively. For instance [‘green’,’yellow’] all points will be filled in green or yellow, alternatively.
* A column name or position whose values will be used to color the marker points according to a colormap.
您不能只给出任何值，而是一个包含颜色值的列（例如，您将有一个包含值 "green"、"red" 等的列
你想做什么，看看here
假设我在数据框中有这个 table：
DATE SUNHOUR YEAR
--- ---------- --------- ------
281 2018-10-09 11.1 2018
29 2018-01-30 6.5 2018
266 2018-09-24 6.2 2018
115 2018-04-26 13.4 2018
69 2018-03-11 7.3 2018
158 2019-06-08 13.7 2019
287 2019-10-15 8.5 2019
177 2019-06-27 15.9 2019
136 2019-05-17 11.5 2019
59 2019-03-01 10.1 2019
这会给我一个散点图：
df.plot.scatter(x='DATE', y='SUNHOUR')
现在，当我查看 at the documentation 时，我读到参数 c 可以采用 列名称或位置，其值将用于根据以下条件为标记点着色颜色图。 所以我认为每年都有不同的颜色：
df.plot.scatter(x='DATE', y='SUNHOUR', c='YEAR')
但是这个returns:
ValueError: 'c' argument must be a color, a sequence of colors, or a sequence of numbers, not ['2018' '2018' '2018' '2018' '2018' '2019' '2019' '2019' '2019' '2019']
我错过了什么？
根据文档：
c : str, int or array_like, optional
The color of each point. Possible values are:
* A single color string referred to by name, RGB or RGBA code, for instance ‘red’ or ‘#a98d19’.
* A sequence of color strings referred to by name, RGB or RGBA code, which will be used for each point’s color recursively. For instance [‘green’,’yellow’] all points will be filled in green or yellow, alternatively.
* A column name or position whose values will be used to color the marker points according to a colormap.
您不能只给出任何值，而是一个包含颜色值的列（例如，您将有一个包含值 "green"、"red" 等的列
你想做什么，看看here