python中da_Python中的PLSDA加载图

如何使用PLS-DA绘图的Matplotlib绘制加载图，如PCA的加载图？在

为了绘制PLS-DA图，我使用以下代码：from sklearn.preprocessing import StandardScaler

from sklearn.cross_decomposition import PLSRegression

import numpy as np

import pandas as pd

targets = [0, 1]

x_vals = StandardScaler().fit_transform(df.values)

y = [g == targets[0] for g in sample_description]

y = np.array(y, dtype=int)

plsr = PLSRegression(n_components=2, scale=False)

plsr.fit(x_vals, y)

colormap = {

targets[0]: '#ff0000', # Red

targets[1]: '#0000ff', # Blue

}

colorlist = [colormap[c] for c in sample_description]

scores = pd.DataFrame(plsr.x_scores_)

scores.index = x.index

x_loadings = plsr.x_loadings_

y_loadings = plsr.y_loadings_

fig1, ax = get_default_fig_ax('Scores on LV 1', 'Scores on LV 2', title)

ax = scores.plot(x=0, y=1, kind='scatter', s=50, alpha=0.7,

c=colorlist, ax=ax)