# 创建一个Matplotlib的Figure对象 self.figure = Figure(figsize=(5, 4), dpi=100) # 在Figure中添加一个Axes对象 self.ax = self.figure.add_subplot(111) self.setFont(QFont('SansSerif', 10)) self.ax.set_xlabel(textjianting, fontsize=18, fontfamily='sans-serif') self.ax.set_ylabel("Y-axis") self.ax.set_title("Matplotlib in PyQt6") self.ax.yaxis.grid(color='red', linestyle='dashed') # 创建一个FigureCanvas对象,并将其放置在QWidget中 self.canvas = FigureCanvas(se如何以文件的形式来保存这个self.figure,请用python代码表示lf.figure)
时间: 2024-01-13 17:05:58 浏览: 28
您可以使用Matplotlib中的savefig方法来将Figure对象保存为文件,代码如下:
```
self.figure.savefig('figure.png')
```
这将把Figure对象保存为名为“figure.png”的PNG文件。您可以将文件名替换为其他格式的文件名(如PDF,SVG等),以另一种格式保存Figure对象。
相关问题
import tkinter as tk import pandas as pd import matplotlib.pyplot as plt from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg import os class ExcelPlotter(tk.Frame): def init(self, master=None): super().init(master) self.master = master self.master.title("图方便") self.file_label = tk.Label(master=self, text="Excel File Path:") self.file_label.grid(row=0, column=0, sticky="w") self.file_entry = tk.Entry(master=self) self.file_entry.grid(row=0, column=1, columnspan=2, sticky="we") self.file_button = tk.Button(master=self, text="Open", command=self.open_file) self.file_button.grid(row=0, column=3, sticky="e") self.plot_button = tk.Button(master=self, text="Plot", command=self.plot_data) self.plot_button.grid(row=1, column=2, sticky="we") self.name_label = tk.Label(master=self, text="Out Image Name:") self.name_label.grid(row=2, column=0, sticky="w") self.name_entry = tk.Entry(master=self) self.name_entry.grid(row=2, column=1, columnspan=2, sticky="we") self.save_button = tk.Button(master=self, text="Save", command=self.save_image) self.save_button.grid(row=2, column=3, sticky="e") self.figure = plt.figure(figsize=(5, 4), dpi=150) self.canvas = FigureCanvasTkAgg(self.figure, master=self) self.canvas.get_tk_widget().grid(row=4, column=0, columnspan=4, sticky="we") self.pack() def open_file(self): file_path = tk.filedialog.askopenfilename(filetypes=[("Excel Files", "*.xls")]) self.file_entry.delete(0, tk.END) self.file_entry.insert(tk.END, file_path) def plot_data(self): file_path = self.file_entry.get() if os.path.exists(file_path): data = pd.read_excel(file_path) plt.plot(data['波长(nm)'], data['吸光度'], 'k') plt.xlim(300, 1000) plt.xlabel('Wavelength(nm)', fontsize=16) plt.ylabel('Abs.', fontsize=16) plt.gcf().subplots_adjust(left=0.13, top=0.91, bottom=0.16) plt.savefig('Last Fig', dpi=1000) plt.show() def save_image(self): if self.figure: file_path = tk.filedialog.asksaveasfilename(defaultextension=".png") if file_path: self.figure.savefig(file_path) root = tk.Tk() app = ExcelPlotter(master=root) app.mainloop()帮我增加一个删除当前图像的功能
好的,您可以在 `ExcelPlotter` 类中添加一个名为 `delete_image` 的方法,实现删除当前图像的功能。可以在该方法中调用 `self.figure.clf()` 清空当前图像,然后在界面上更新显示。下面是修改后的代码:
```python
import tkinter as tk
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
import os
class ExcelPlotter(tk.Frame):
def __init__(self, master=None):
super().__init__(master)
self.master = master
self.master.title("图方便")
self.file_label = tk.Label(master=self, text="Excel File Path:")
self.file_label.grid(row=0, column=0, sticky="w")
self.file_entry = tk.Entry(master=self)
self.file_entry.grid(row=0, column=1, columnspan=2, sticky="we")
self.file_button = tk.Button(master=self, text="Open", command=self.open_file)
self.file_button.grid(row=0, column=3, sticky="e")
self.plot_button = tk.Button(master=self, text="Plot", command=self.plot_data)
self.plot_button.grid(row=1, column=2, sticky="we")
self.delete_button = tk.Button(master=self, text="Delete", command=self.delete_image)
self.delete_button.grid(row=1, column=3, sticky="e")
self.name_label = tk.Label(master=self, text="Out Image Name:")
self.name_label.grid(row=2, column=0, sticky="w")
self.name_entry = tk.Entry(master=self)
self.name_entry.grid(row=2, column=1, columnspan=2, sticky="we")
self.save_button = tk.Button(master=self, text="Save", command=self.save_image)
self.save_button.grid(row=2, column=3, sticky="e")
self.figure = plt.figure(figsize=(5, 4), dpi=150)
self.canvas = FigureCanvasTkAgg(self.figure, master=self)
self.canvas.get_tk_widget().grid(row=4, column=0, columnspan=4, sticky="we")
self.pack()
def open_file(self):
file_path = tk.filedialog.askopenfilename(filetypes=[("Excel Files", "*.xls")])
self.file_entry.delete(0, tk.END)
self.file_entry.insert(tk.END, file_path)
def plot_data(self):
file_path = self.file_entry.get()
if os.path.exists(file_path):
data = pd.read_excel(file_path)
plt.plot(data['波长(nm)'], data['吸光度'], 'k')
plt.xlim(300, 1000)
plt.xlabel('Wavelength(nm)', fontsize=16)
plt.ylabel('Abs.', fontsize=16)
plt.gcf().subplots_adjust(left=0.13, top=0.91, bottom=0.16)
plt.show()
def delete_image(self):
if self.figure:
self.figure.clf()
self.canvas.draw()
def save_image(self):
if self.figure:
file_path = tk.filedialog.asksaveasfilename(defaultextension=".png")
if file_path:
self.figure.savefig(file_path)
root = tk.Tk()
app = ExcelPlotter(master=root)
app.mainloop()
```
在界面上添加了一个名为 `Delete` 的按钮,点击该按钮会调用 `delete_image` 方法。该方法会清空当前图像并在界面上更新显示。
class MyApp(QMainWindow): signal = pyqtSignal(str, str, int, str) def init(self, parent= None): super(MyApp, self).init(parent) self.setWindowTitle("Matplotlib in PyQt6") MainWindow.resize(self, 800, 600) self.star() self.initUI() def star(self): btn1 = QPushButton("Button 1", self) btn1.move(30, 50) btn2 = QPushButton("Button 2", self) btn2.move(150, 50) btn1.clicked.connect(self.buttonClicked1) btn2.clicked.connect(self.buttonClicked2) # create textbox self.textbox1 = QLineEdit(self) self.textbox1.setText("123") self.textbox2 = QLineEdit(self) self.textbox1.move(20, 20) self.textbox1.resize(280, 40) self.textbox2.move(20, 150) self.textbox2.resize(280, 40) self.show() def initUI(self): # 创建一个QWidget对象 central_widget = QWidget(self) # 将该QWidget设置为主窗口的中心组件 self.setCentralWidget(central_widget) # 创建需要显示的QWidget组件,例如QPushButton和QLabel button = QPushButton("Button", central_widget) label = QLabel("Label", central_widget) label.setFixedSize(100, 10) # 创建一个Matplotlib的Figure对象 self.figure = Figure(figsize=(5, 4), dpi=100) # 在Figure中添加一个Axes对象 self.axes = self.figure.add_subplot(111) self.axes.set_xlabel("X-axis") self.axes.set_ylabel("Y-axis") self.axes.set_title("Matplotlib in PyQt6") # 创建一个FigureCanvas对象,并将其放置在QWidget中 canvas = FigureCanvas(self.figure) canvas.resize(self, 200, 100) canvas.updateGeometry() # 将FigureCanvas添加到QWidget中 central_widget = QWidget(self) self.setCentralWidget(central_widget) # 创建一个QVBoxLayout对象,将需要显示的QWidget组件添加到其中 layout = QVBoxLayout(central_widget) layout.addWidget(button) layout.addWidget(label) layout.addWidget(label) layout.addWidget(canvas) @pyqtSlot() def buttonClicked1(self): text = self.textbox1.text() self.statusBar().showMessage(text) @pyqtSlot() def buttonClicked2(self): text = self.textbox1.text() self.textbox2.setText(text) self.statusBar().showMessage(text)如何把def sta里的textbox获得的参数通过他的监听把参数传值到def init上,使得def init 上可以获得外部的值作为变量传入调用
你可以在 `star()` 方法中将 `self.textbox1` 和 `self.textbox2` 的文本内容保存为实例变量,然后在 `buttonClicked1()` 和 `buttonClicked2()` 方法中更新这些实例变量。然后你就可以在 `initUI()` 方法中使用这些实例变量了。下面是修改后的代码:
```
class MyApp(QMainWindow):
signal = pyqtSignal(str, str, int, str)
def __init__(self, parent=None):
super(MyApp, self).__init__(parent)
self.setWindowTitle("Matplotlib in PyQt6")
self.resize(800, 600)
self.textbox1_text = ""
self.textbox2_text = ""
self.star()
self.initUI()
def star(self):
btn1 = QPushButton("Button 1", self)
btn1.move(30, 50)
btn2 = QPushButton("Button 2", self)
btn2.move(150, 50)
btn1.clicked.connect(self.buttonClicked1)
btn2.clicked.connect(self.buttonClicked2)
self.textbox1 = QLineEdit(self)
self.textbox1.setText("123")
self.textbox1.move(20, 20)
self.textbox1.resize(280, 40)
self.textbox1.textChanged.connect(self.textbox1Changed)
self.textbox2 = QLineEdit(self)
self.textbox1.move(20, 150)
self.textbox1.resize(280, 40)
self.textbox2.textChanged.connect(self.textbox2Changed)
self.show()
def initUI(self):
central_widget = QWidget(self)
self.setCentralWidget(central_widget)
button = QPushButton("Button", central_widget)
label = QLabel("Label", central_widget)
label.setFixedSize(100, 10)
self.figure = Figure(figsize=(5, 4), dpi=100)
self.axes = self.figure.add_subplot(111)
self.axes.set_xlabel("X-axis")
self.axes.set_ylabel("Y-axis")
self.axes.set_title("Matplotlib in PyQt6")
self.canvas = FigureCanvas(self.figure)
self.canvas.resize(self, 200, 100)
self.canvas.updateGeometry()
layout = QVBoxLayout(central_widget)
layout.addWidget(button)
layout.addWidget(label)
layout.addWidget(label)
layout.addWidget(self.canvas)
@pyqtSlot()
def buttonClicked1(self):
text = self.textbox1_text
self.statusBar().showMessage(text)
@pyqtSlot()
def buttonClicked2(self):
text = self.textbox2_text
self.textbox2.setText(text)
self.statusBar().showMessage(text)
@pyqtSlot(str)
def textbox1Changed(self, text):
self.textbox1_text = text
@pyqtSlot(str)
def textbox2Changed(self, text):
self.textbox2_text = text
```