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创建函数拟合工具，准备创建MR工具箱

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RB 2025-05-24 19:59:53 +08:00
parent 918f6b443c
commit 2e8c902dd2
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import sys
from PyQt5.QtWidgets import (
QApplication, QWidget, QLabel, QPushButton, QTextEdit, QVBoxLayout,
QHBoxLayout, QStackedWidget, QSizePolicy, QFrame
)
from PyQt5.QtGui import QPixmap, QFont
from PyQt5.QtCore import Qt
class ToolboxUI(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("MRobot 工具箱")
self.setMinimumSize(900, 600)
self.init_ui()
def init_ui(self):
# 主布局
main_layout = QHBoxLayout(self)
main_layout.setContentsMargins(10, 10, 10, 10)
main_layout.setSpacing(10)
# 左半区
left_frame = QFrame()
left_frame.setFrameShape(QFrame.StyledPanel)
left_layout = QVBoxLayout(left_frame)
left_layout.setSpacing(20)
# Logo
logo_label = QLabel()
logo_pixmap = QPixmap(180, 80)
logo_pixmap.fill(Qt.transparent)
logo_label.setPixmap(logo_pixmap)
logo_label.setText("MRobot")
logo_label.setAlignment(Qt.AlignCenter)
logo_label.setFont(QFont("Arial", 28, QFont.Bold))
logo_label.setStyleSheet("color: #3498db;")
logo_label.setFixedHeight(100)
left_layout.addWidget(logo_label)
# 按钮区
self.buttons = []
button_names = ["功能一", "功能二", "功能三", "功能四"]
for idx, name in enumerate(button_names):
btn = QPushButton(name)
btn.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
btn.setMinimumHeight(40)
btn.setStyleSheet("""
QPushButton {
background-color: #2980b9; color: white;
border-radius: 8px; font-size: 16px;
}
QPushButton:hover {
background-color: #3498db;
}
""")
btn.clicked.connect(lambda checked, i=idx: self.switch_function(i))
self.buttons.append(btn)
left_layout.addWidget(btn)
left_layout.addStretch(1)
# 文本输出框
self.output_box = QTextEdit()
self.output_box.setReadOnly(True)
self.output_box.setFixedHeight(80)
self.output_box.setStyleSheet("background: #f4f6f7; border-radius: 6px;")
left_layout.addWidget(self.output_box)
left_frame.setMaximumWidth(240)
main_layout.addWidget(left_frame)
# 右半区
self.stack = QStackedWidget()
for i in range(len(button_names)):
page = QLabel(f"这里是 {button_names[i]} 的功能界面")
page.setAlignment(Qt.AlignCenter)
page.setFont(QFont("微软雅黑", 20))
self.stack.addWidget(page)
main_layout.addWidget(self.stack)
# 默认输出
self.output_box.append("欢迎使用 MRobot 工具箱！请选择左侧功能。")
def switch_function(self, idx):
self.stack.setCurrentIndex(idx)
self.output_box.append(f"已切换到功能：{self.buttons[idx].text()}")
if __name__ == "__main__":
app = QApplication(sys.argv)
win = ToolboxUI()
win.show()
sys.exit(app.exec_())

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import tkinter as tk
from tkinter import filedialog, messagebox, ttk
import numpy as np
import pandas as pd
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
class PolyFitApp:
def __init__(self, root):
self.root = root
self.root.title("多项式拟合工具")
self.data_x = []
self.data_y = []
self.last_coeffs = None
# ===== 主布局 =====
main_frame = ttk.Frame(root, padding=8)
main_frame.pack(fill="both", expand=True)
main_frame.columnconfigure(0, weight=0)
main_frame.columnconfigure(1, weight=1)
main_frame.rowconfigure(0, weight=1)
# ===== 左侧区 =====
left_frame = ttk.Frame(main_frame, width=320, height=580) # 设置固定宽度
left_frame.grid(row=0, column=0, sticky="nsw") # 只贴左侧
left_frame.columnconfigure(0, weight=1)
left_frame.grid_propagate(False) # 防止自动缩放
# --- 数据输入区 ---
input_frame = ttk.LabelFrame(left_frame, text="数据输入", padding=6)
input_frame.grid(row=0, column=0, sticky="ew", pady=(0, 8))
input_frame.columnconfigure(0, weight=1)
self.excel_btn = ttk.Button(input_frame, text="导入excel文件", command=self.load_excel)
self.excel_btn.grid(row=0, column=0, sticky="ew", padx=2, pady=2)
# 滚动区域
self.scroll_canvas = tk.Canvas(input_frame, height=200)
self.scroll_canvas.grid(row=1, column=0, sticky="ew", pady=4)
self.scrollbar = ttk.Scrollbar(input_frame, orient="vertical", command=self.scroll_canvas.yview)
self.scrollbar.grid(row=1, column=1, sticky="ns")
self.scroll_canvas.configure(yscrollcommand=self.scrollbar.set)
self.manual_frame = ttk.Frame(self.scroll_canvas)
self.manual_frame.bind("<Configure>", lambda e: self.scroll_canvas.configure(scrollregion=self.scroll_canvas.bbox("all")))
self.scroll_canvas.create_window((0, 0), window=self.manual_frame, anchor="nw")
self.point_rows = []
self.add_row_btn = ttk.Button(input_frame, text="添加数据", command=self.add_point_row)
self.add_row_btn.grid(row=2, column=0, sticky="ew", padx=2, pady=2)
# --- 参数区 ---
param_frame = ttk.LabelFrame(left_frame, text="拟合参数", padding=6)
param_frame.grid(row=1, column=0, sticky="ew", pady=(0, 8))
ttk.Label(param_frame, text="选择多项式阶数:").grid(row=0, column=0, padx=2, pady=2, sticky="e")
self.order_spin = ttk.Spinbox(param_frame, from_=1, to=10, width=5)
self.order_spin.set(2)
self.order_spin.grid(row=0, column=1, padx=2, pady=2, sticky="w")
# 优化复选框和拟合按钮同一行
self.fit_btn = ttk.Button(param_frame, text="拟合并显示", command=self.fit_and_plot)
self.fit_btn.grid(row=1, column=0, padx=2, pady=4, sticky="ew")
self.optimize_var = tk.BooleanVar(value=True)
self.optimize_check = ttk.Checkbutton(param_frame, text="优化曲线（防止突起）", variable=self.optimize_var)
self.optimize_check.grid(row=1, column=1, padx=2, pady=4, sticky="w")
# --- 输出区 ---
output_frame = ttk.LabelFrame(left_frame, text="表达式与代码", padding=6)
output_frame.grid(row=2, column=0, sticky="ew")
self.output = tk.Text(output_frame, height=6, width=40, font=("Consolas", 10))
self.output.grid(row=0, column=0, columnspan=3, padx=2, pady=2)
ttk.Label(output_frame, text="输出代码格式:").grid(row=1, column=0, padx=2, pady=2, sticky="e")
self.code_type = ttk.Combobox(output_frame, values=["C", "C++", "Python"], width=8)
self.code_type.set("C")
self.code_type.grid(row=1, column=1, padx=2, pady=2, sticky="w")
self.gen_code_btn = ttk.Button(output_frame, text="生成函数代码", command=self.generate_code)
self.gen_code_btn.grid(row=1, column=2, padx=2, pady=2, sticky="ew")
# ===== 右侧区 =====
right_frame = ttk.Frame(main_frame)
# right_frame.grid(row=0, column=1, sticky="nsew") # 填满剩余空间
right_frame.grid(row=0, column=1, sticky="nsew", padx=(8, 0))
right_frame.rowconfigure(0, weight=1)
right_frame.columnconfigure(0, weight=1)
plot_frame = ttk.LabelFrame(right_frame, text="拟合曲线", padding=6)
plot_frame.grid(row=0, column=0, sticky="nsew")
plot_frame.rowconfigure(0, weight=1)
plot_frame.columnconfigure(0, weight=1)
self.figure = Figure(figsize=(5, 4))
self.canvas = FigureCanvasTkAgg(self.figure, master=plot_frame)
self.canvas.get_tk_widget().pack(fill="both", expand=True)
self.scroll_canvas.bind_all("<MouseWheel>", self._on_mousewheel)
def _on_mousewheel(self, event):
# Windows下event.delta为120的倍数，负值向下
self.scroll_canvas.yview_scroll(int(-1*(event.delta/120)), "units")
def add_point_row(self, x_val="", y_val=""):
row = {}
idx = len(self.point_rows)
row['x'] = ttk.Entry(self.manual_frame, width=10)
row['x'].insert(0, str(x_val))
row['y'] = ttk.Entry(self.manual_frame, width=10)
row['y'].insert(0, str(y_val))
row['del'] = ttk.Button(self.manual_frame, text="删除", width=5, command=lambda r=idx: self.delete_point_row(r))
row['x'].grid(row=idx, column=0, padx=1, pady=1)
row['y'].grid(row=idx, column=1, padx=1, pady=1)
row['del'].grid(row=idx, column=2, padx=1, pady=1)
self.point_rows.append(row)
self.refresh_point_rows()
def delete_point_row(self, idx):
for widget in self.point_rows[idx].values():
widget.grid_forget()
widget.destroy()
self.point_rows.pop(idx)
self.refresh_point_rows()
def refresh_point_rows(self):
for i, row in enumerate(self.point_rows):
row['x'].grid(row=i, column=0, padx=1, pady=1)
row['y'].grid(row=i, column=1, padx=1, pady=1)
row['del'].config(command=lambda r=i: self.delete_point_row(r))
row['del'].grid(row=i, column=2, padx=1, pady=1)
def load_excel(self):
file = filedialog.askopenfilename(filetypes=[("Excel files", "*.xlsx *.xls")])
if file:
try:
data = pd.read_excel(file, usecols=[0, 1])
new_x = data.iloc[:, 0].values.tolist()
new_y = data.iloc[:, 1].values.tolist()
messagebox.showinfo("成功", "数据导入成功！")
for x, y in zip(new_x, new_y):
self.add_point_row(x, y)
except Exception as e:
messagebox.showerror("错误", f"读取Excel失败: {e}")
def get_manual_points(self):
x_list, y_list = [], []
for row in self.point_rows:
try:
x = float(row['x'].get())
y = float(row['y'].get())
x_list.append(x)
y_list.append(y)
except ValueError:
continue
return x_list, y_list
def fit_and_plot(self):
# 始终以手动输入区为准
self.data_x, self.data_y = self.get_manual_points()
try:
order = int(self.order_spin.get())
except ValueError:
messagebox.showwarning("输入错误", "阶数必须为整数！")
return
n_points = len(self.data_x)
if n_points < order + 1:
messagebox.showwarning("数据不足", "数据点数量不足以拟合该阶多项式！")
return
# 阶数过高判断，只提示不强制修改
max_order = max(2, min(6, n_points // 3))
if order > max_order:
messagebox.showwarning("阶数过高", f"当前数据点数为{n_points}，建议阶数不超过{max_order}，否则容易出现异常突起！")
x = np.array(self.data_x, dtype=np.float64)
y = np.array(self.data_y, dtype=np.float64)
# ----------- 新增归一化 -----------
x_min, x_max = x.min(), x.max()
if x_max - x_min == 0:
messagebox.showwarning("数据错误", "所有x值都相同，无法拟合！")
return
x_norm = (x - x_min) / (x_max - x_min)
# ---------------------------------
try:
if self.optimize_var.get():
# 优化：加大rcond，减少高阶影响
coeffs = np.polyfit(x_norm, y, order, rcond=1e-3)
else:
coeffs = np.polyfit(x_norm, y, order)
except Exception as e:
messagebox.showerror("拟合错误", f"多项式拟合失败：{e}")
return
poly = np.poly1d(coeffs)
expr = "y = " + " + ".join([f"{c:.6g}*x_norm^{order-i}" for i, c in enumerate(coeffs)])
self.output.delete(1.0, tk.END)
self.output.insert(tk.END, f"归一化x: x_norm=(x-{x_min:.6g})/({x_max:.6g}-{x_min:.6g})\n")
self.output.insert(tk.END, expr + "\n")
# 绘图
self.figure.clear()
ax = self.figure.add_subplot(111)
ax.scatter(x, y, color='red', label='数据点')
x_fit = np.linspace(x_min, x_max, 200)
x_fit_norm = (x_fit - x_min) / (x_max - x_min)
y_fit = poly(x_fit_norm)
ax.plot(x_fit, y_fit, label='拟合曲线')
ax.legend()
self.canvas.draw()
self.last_coeffs = coeffs
self.last_xmin = x_min
self.last_xmax = x_max
def generate_code(self):
if self.last_coeffs is None:
messagebox.showwarning("未拟合", "请先拟合数据！")
return
coeffs = self.last_coeffs
order = len(coeffs) - 1
code_type = self.code_type.get()
if code_type == "C":
code = self.create_c_function(coeffs)
elif code_type == "C++":
code = self.create_cpp_function(coeffs)
else:
code = self.create_py_function(coeffs)
self.output.delete(1.0, tk.END)
self.output.insert(tk.END, code)
def create_c_function(self, coeffs):
lines = ["#include <math.h>", "double polynomial(double x) {", " return "]
n = len(coeffs)
terms = []
for i, c in enumerate(coeffs):
exp = n - i - 1
if exp == 0:
terms.append(f"{c:.8g}")
elif exp == 1:
terms.append(f"{c:.8g}*x")
else:
terms.append(f"{c:.8g}*pow(x,{exp})")
lines[-1] += " + ".join(terms) + ";"
lines.append("}")
return "\n".join(lines)
def create_cpp_function(self, coeffs):
lines = ["#include <cmath>", "double polynomial(double x) {", " return "]
n = len(coeffs)
terms = []
for i, c in enumerate(coeffs):
exp = n - i - 1
if exp == 0:
terms.append(f"{c:.8g}")
elif exp == 1:
terms.append(f"{c:.8g}*x")
else:
terms.append(f"{c:.8g}*pow(x,{exp})")
lines[-1] += " + ".join(terms) + ";"
lines.append("}")
return "\n".join(lines)
def create_py_function(self, coeffs):
n = len(coeffs)
lines = ["def polynomial(x):", " return "]
terms = []
for i, c in enumerate(coeffs):
exp = n - i - 1
if exp == 0:
terms.append(f"{c:.8g}")
elif exp == 1:
terms.append(f"{c:.8g}*x")
else:
terms.append(f"{c:.8g}*x**{exp}")
lines[-1] += " + ".join(terms)
return "\n".join(lines)
if __name__ == "__main__":
root = tk.Tk()
app = PolyFitApp(root)
root.mainloop()