小编Sar*_*ssi的帖子

我想在此图中显示框架。 我尝试运行下面的代码，但没有成功：

ax = self.canvas.figure.add_subplot(111)
ax.spines['top'].set_visible(True)
ax.spines['right'].set_visible(True)
ax.spines['bottom'].set_visible(True)
ax.spines['left'].set_visible(True)
ax.plot(diff)

我也尝试过：

plt.tight_layout()

但它会产生此错误：

> File "runme.py", line 54, in autocorr_function
>     plt.tight_layout()   File "/usr/local/lib/python2.7/dist-packages/matplotlib/pyplot.py", line
> 1406, in tight_layout
>     fig.tight_layout(pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect)   File "/usr/local/lib/python2.7/dist-packages/matplotlib/figure.py",
> line 1753, in tight_layout
>     rect=rect)   File "/usr/local/lib/python2.7/dist-packages/matplotlib/tight_layout.py",
> line 326, in get_tight_layout_figure
>     max_nrows = max(nrows_list) ValueError: max() arg is an empty sequence

您的帮助将不胜感激，谢谢。

编辑：这是画布的代码：

from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas 

import matplotlib.pyplot as plt from PyQt4 import QtGui 

class   Canvas(FigureCanvas):

     def …

我想在 PyQt 中绘制一个带有嵌入式 matplotlib 的图形。我在主窗口使用 Qt Designer，并为信号和插槽连接部分编写 python 代码。

所以我的代码是这样的：

import sys
from PyQt4 import QtCore, QtGui, uic
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas 
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QT as NavigationToolbar
import matplotlib.pyplot as plt
import pandas as pd
import numpy as np


qtCreatorFile = "main.ui" # my Qt Designer file 

Ui_MainWindow, QtBaseClass = uic.loadUiType(qtCreatorFile)

class MyApp(QtGui.QMainWindow, Ui_MainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        Ui_MainWindow.__init__(self)
        self.setupUi(self)

        self.figure = plt.figure()

        self.canvas = FigureCanvas(self.figure)

        self.csvbutton.clicked.connect(self.plot)

    def plot(self):

        filePath="/path to csv file here"
        df= pd.read_csv(str(filePath),index_col='date')
        df.index = …