我使用seaborn clustermap基于spearman的相关矩阵创建了一个heatmap,如下所示:我想绘制树状图。我希望树状图像这样: dendrogram 但是在热图上
我创建了一个颜色目录,如下所示,但出现了一个错误:
def assign_tree_colour(name,val_dict,coding_names_df):
ret = None
if val_dict.get(name, '') == 'Group 1':
ret = "(0,0.9,0.4)" #green
elif val_dict.get(name, '') == 'Group 2':
ret = "(0.6,0.1,0)" #red
elif val_dict.get(name, '') == 'Group 3':
ret = "(0.3,0.8,1)" #light blue
elif val_dict.get(name, '') == 'Group 4':
ret = "(0.4,0.1,1)" #purple
elif val_dict.get(name, '') == 'Group 5':
ret = "(1,0.9,0.1)" #yellow
elif val_dict.get(name, '') == 'Group 6':
ret = "(0,0,0)" #black
else:
ret = "(0,0,0)" #black
return ret
def fix_string(str):
return str.replace('"', '')
external_data3 = [list(z) for z in coding_names_df.values]
external_data3 = {fix_string(z[0]): z[3] for z in external_data3}
tree_label = list(df.index)
tree_label = [fix_string(x) for x in tree_label]
tree_labels = { j : tree_label[j] for j in range(0, len(tree_label) ) }
tree_colour = [assign_tree_colour(label, external_data3, coding_names_df) for label in tree_labels]
tree_colors = { i : tree_colour[i] for i in range(0, len(tree_colour) ) }
sns.set(color_codes=True)
sns.set(font_scale=1)
g = sns.clustermap(df, cmap="bwr",
vmin=-1, vmax=1,
yticklabels=1, xticklabels=1,
cbar_kws={"ticks":[-1,-0.5,0,0.5,1]},
figsize=(13,13),
row_colors=row_colors,
col_colors=col_colors,
method='average',
metric='correlation',
tree_kws=dict(colors=tree_colors))
g.ax_heatmap.set_xlabel('Genus')
g.ax_heatmap.set_ylabel('Genus')
for label in Group.unique():
g.ax_col_dendrogram.bar(0, 0, color=lut[label],
label=label, linewidth=0)
g.ax_col_dendrogram.legend(loc=9, ncol=7, bbox_to_anchor=(0.26, 0., 0.5, 1.5))
ax=g.ax_heatmap
File "<ipython-input-64-4bc6be89afe3>", line 11, in <module>
tree_kws=dict(colors=tree_colors))
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\seaborn\matrix.py", line 1391, in clustermap
tree_kws=tree_kws, **kwargs)
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\seaborn\matrix.py", line 1208, in plot
tree_kws=tree_kws)
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\seaborn\matrix.py", line 1054, in plot_dendrograms
tree_kws=tree_kws
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\seaborn\matrix.py", line 776, in dendrogram
return plotter.plot(ax=ax, tree_kws=tree_kws)
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\seaborn\matrix.py", line 692, in plot
**tree_kws)
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib\collections.py", line 1316, in __init__
colors = mcolors.to_rgba_array(colors)
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib\colors.py", line 294, in to_rgba_array
result[i] = to_rgba(cc, alpha)
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib\colors.py", line 177, in to_rgba
rgba = _to_rgba_no_colorcycle(c, alpha)
File "C:\Users\rotemb\AppData\Local\Continuum\anaconda3\lib\site-packages\matplotlib\colors.py", line 240, in _to_rgba_no_colorcycle
raise ValueError("Invalid RGBA argument: {!r}".format(orig_c))
ValueError: Invalid RGBA argument: 0
在此方面的任何帮助都将不胜感激! Tnx
基于上述答案,下面是一个以不同方式为主要三个分支着色的示例,暴力(前49行为红色,后35行为绿色,最后62行为蓝色,其余两行为黑色):
对于一般情况,可从树状图(此处描述scipy linkage format)中得出要着色的线条数:
尽管如此,我还没有找到一种方法来改变顶部树状图的颜色
根据^{} 文档,可以通过
tree_kws
(采用dict)及其colors
属性设置树状图着色,该属性需要一个RGB元组列表,如(0.5, 0.5, 1)
。似乎colors
除了RGB元组格式的数据外,什么都不支持您是否注意到
clustermap
支持树状图和相关矩阵之间的层次颜色条的嵌套列表或数据帧?如果树状图过于拥挤,它们可能会很有用我希望这有帮助
编辑
RGB列表是
LineCollection
中线条颜色的序列——它使用序列在两个树状图中绘制每条线条。(顺序似乎从列树状图的最右侧分支开始)为了将某个标签与数据点关联,需要计算树状图中数据点的绘图顺序编辑二
下面是一个基于^{} 示例为树着色的最小示例:
如您所见,树的绘制线顺序从图像的右上角开始,因此不会与clustermap中显示的数据点顺序相关联。另一方面,颜色条(由
{row,col}_colors
属性控制)可用于此目的相关问题 更多 >
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