PCAで処理して表示する6つの変数を持つ〜1500行のデータセットがあります。
from matplotlib.mlab import PCA
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
from mpl_toolkits.mplot3d import proj3d
import numpy as np
data = np.array(data)
try:
results = PCA(data)
except:
raise
#this will return an array of variance percentages for each component
print results.fracs
#
print results.Wt
#this will return a 2d array of the data projected into PCA space
print results.Y
x = []
y = []
z = []
for item in results.Y:
x.append(item[0])
y.append(item[1])
z.append(item[2])
fig1 = plt.figure() # Make a plotting figure
ax = Axes3D(fig1) # use the plotting figure to create a Axis3D object.
pltData = [x,y,z]
ax.scatter(pltData[0], pltData[1], pltData[2], 'bo') # make a scatter plot of blue dots from the data
# make simple, bare axis lines through space:
xAxisLine = ((min(pltData[0]), max(pltData[0])), (0, 0), (0,0)) # 2 points make the x-axis line at the data extrema along x-axis
ax.plot(xAxisLine[0], xAxisLine[1], xAxisLine[2], 'r') # make a red line for the x-axis.
yAxisLine = ((0, 0), (min(pltData[1]), max(pltData[1])), (0,0)) # 2 points make the y-axis line at the data extrema along y-axis
ax.plot(yAxisLine[0], yAxisLine[1], yAxisLine[2], 'r') # make a red line for the y-axis.
zAxisLine = ((0, 0), (0,0), (min(pltData[2]), max(pltData[2]))) # 2 points make the z-axis line at the data extrema along z-axis
ax.plot(zAxisLine[0], zAxisLine[1], zAxisLine[2], 'r') # make a red line for the z-axis.
# label the axes
ax.set_xlabel("x-axis label")
ax.set_ylabel("y-axis label")
ax.set_zlabel("y-axis label")
ax.set_title("The title of the plot")
plt.show() # show the plot
私が今欲しいのは、たとえば、別のデータ変数に従って、色で表示されるポイントに色を付ける方法です。たとえば、データの各行に ['blue', 'red', 'green'] の範囲の color という変数を追加すると、それを使用して点の色を表示できますか?