與matplotlib GridSpec

Question

縮圖曲線有上SO是anumberofquestions有關創建與matplotlib「縮略圖」曲線（即較小版本的較大小區，其中所述縮略圖情節被疊加到原始的）。

但是，我找不到一個方法來與GridSpec地塊做到這一點。我知道這是因爲來自GridSpec的軸無法轉換（即調整大小和轉換）。

這裏是重現該問題的完整的腳本：

import matplotlib 
from matplotlib import gridspec, pyplot 
from matplotlib.backends.backend_pdf import PdfPages 

def add_inset_to_axis(figure, axis, rect): 
    left, bottom, width, height = rect 
    def transform(coord): 
     return figure.transFigure.inverted().transform(
      axis.transAxes.transform(coord)) 
    fig_left, fig_bottom = transform((left, bottom)) 
    fig_width, fig_height = transform([width, height]) - transform([0, 0]) 
    return figure.add_axes([fig_left, fig_bottom, fig_width, fig_height]) 

def main(): 
    pdf = PdfPages('example.pdf') 
    fig = pyplot.figure() 
    n_rows, n_cols = 2, 2 
    x_range = (-100, 100) 
    outer_grid = gridspec.GridSpec(n_rows, n_cols) 
    index, row, col = 0, 0, 0 
    while index < n_rows * n_cols: 
     data = [x for x in xrange(*x_range)] 
     grid_cell = outer_grid[row, col] 
     axis = pyplot.subplot(grid_cell) 
     axis.plot(range(*x_range), data) 
     inset = add_inset_to_axis(fig, grid_cell, (0.675, 0.82, 0.3, 0.15)) 
     inset.plot(range(0, 10), data[0:10]) 
     col += 1 
     if col == 2: 
      col = 0 
      row += 1 
     index = row * 2 + col 
    pdf.savefig(fig) 
    pdf.close() 

if __name__ == '__main__': 
    print('Using matplotlib version %s' % matplotlib.__version__) 
    main() 

輸出：

Using matplotlib version 1.5.1 
Traceback (most recent call last): 
    File "stackoverflow_inset.py", line 38, in <module> 
    main() 
    File "stackoverflow_inset.py", line 26, in main 
    inset = add_inset_to_axis(fig, grid_cell, (0.675, 0.82, 0.3, 0.15)) 
    File "stackoverflow_inset.py", line 10, in add_inset_to_axis 
    fig_left, fig_bottom = transform((left, bottom)) 
    File "stackoverflow_inset.py", line 9, in transform 
    axis.transAxes.transform(coord)) 
AttributeError: 'SubplotSpec' object has no attribute 'transAxes' 

有沒有解決的辦法？

Answer 1

從函數定義add_inset_to_axis(figure, axis, rect)看來，第二個參數實際上應該是matplotlib.axes實例。的

所以不是給grid_cell作爲一個參數，一個應該使用axis

inset = add_inset_to_axis(fig, axis, (0.675, 0.82, 0.3, 0.15))