用什么网站做一手楼好,软件商店app下载安装,wordpress 发布慢,wordpress缓存图片路径我们将图例进行行显示或者列显示后#xff0c;只能想继续赋予不同行或者列不同的title来进行分类。比较简单的方式#xff0c;就是通过ax.annotate方法添加标签#xff0c;这样方法复用率比较低#xff0c;每次使用都要微调ax.annotate的显示位置。比较方便的方法是在案例1…我们将图例进行行显示或者列显示后只能想继续赋予不同行或者列不同的title来进行分类。比较简单的方式就是通过ax.annotate方法添加标签这样方法复用率比较低每次使用都要微调ax.annotate的显示位置。比较方便的方法是在案例1实现的基础上添加title显示的功能。 motplotlib图例案例1通过多个legend完全控制图例显示顺序指定按行排序 or 按列排序 添加title显示功能后的代码
import matplotlib.pyplot as plt
import matplotlib.axes
from typing import List, Tuple, Any
#这个函数可以获得axis对象的已经绘制的artist中的所有的hander和labels这个可以只给它一个axis参数。注意这个参数需要是列表类的。
from matplotlib.legend import _get_legend_handles_labels as get_legend_handles_labelsdef custom_legend_layout(axis: matplotlib.axes.Axes,handlers: List[Any]None,labels: List[str]None,n_items: int 3,offset: float 0.05,vertical: bool False,loc: str upper right,first_bbox_to_anchor: Tuple[float, float] (1, 1),title:List[str]None,title_shift:List[Tuple[float,float]]None,**kwargs) - None:A function to arrange legend items in a custom layout.:param axis: Axis object on which to place the legends.:param lines: List of line objects to include in the legends.:param labels: List of labels corresponding to the line objects.:param n_items: Number of items per row (if verticalFalse) or column (if verticalTrue).:param offset: Vertical offset between rows (or horizontal offset between columns if verticalTrue).:param vertical: If True, legends are arranged vertically, otherwise horizontally.:param loc: Location anchor for all legends.:param first_bbox_to_anchor: ~matplotlib.transforms.BboxBase instanceBbox anchor of the first legend.:param kwargs: Additional keyword arguments to pass to the legend function.va_dict{center:center,lower:top,upper:bottom}ha_dict{center: center,right:left,left:right,}if (handlers is None) ! (labels is None): # Check if only one of handlers or labels is providedraise ValueError(Both handlers and labels must be specified if one is provided.)if (handlers is None) and (labels is None): # get default handlers and labels from axhandlers,labelsget_legend_handles_labels(axs[axis]) # note: the param axs is list object# 确保n_items不为0避免除以0的错误n_items max(1, n_items)# 计算需要多少个图例n_legends len(handlers) // n_items (1 if len(handlers) % n_items else 0)# 计算每个图例的bbox_to_anchorfor i in range(n_legends):start_idx i * n_itemsend_idx min(start_idx n_items, len(handlers))legend_lines handlers[start_idx:end_idx]legend_labels labels[start_idx:end_idx]if vertical:# 对于垂直布局ncol 1if i 0:bbox_anchor first_bbox_to_anchorelse:# 计算后续图例的bbox_to_anchorbbox_anchor (first_bbox_to_anchor[0] i * offset, first_bbox_to_anchor[1])else:# 对于水平布局ncol len(legend_lines)if i 0:bbox_anchor first_bbox_to_anchorelse:# 计算后续图例的bbox_to_anchorbbox_anchor (first_bbox_to_anchor[0], first_bbox_to_anchor[1] - i * offset)legend axis.legend(legend_lines, legend_labels, locloc, bbox_to_anchorbbox_anchor, ncolncol, frameonFalse, **kwargs)axis.add_artist(legend)# 计算每个title的位置va_key,ha_keyloc.split( )if title and len(title)n_legends:w_shift title_shift[i][0] if title_shift else 0h_shifttitle_shift[i][1] if title_shift else 0axis.annotate(texttitle[i],xy(bbox_anchor[0]w_shift, bbox_anchor[1]h_shift),xycoordsaxes fraction,vava_dict[va_key],haha_dict[ha_key])if __name__ __main__:# 示例使用这个函数fig, ax plt.subplots()handlers [ax.scatter(range(10), [i * x for x in range(10)], labelfLine {i}) for i in range(7)]# 调用函数横向排列图例custom_legend_layout(ax, n_items3, offset0.25, verticalTrue,locupper left, first_bbox_to_anchor(0.2, 0.8),title[title 1,title 2,title 3],#title_shift[(-0.1,0),(-0.1,0),(-0.1,0)],)from matplotlib.legend import _get_legend_handles_labels as get_legend_handles_labelshandles,labelsget_legend_handles_labels([ax])plt.show()运行后
