scipy.optimize.fminbound(func, 0, 1)
http://docs.scipy.org/doc/scipy/reference/generated/scipy.optimize.fminbound.html#scipy.optimize.fminbound
scipy.optimize.minimize_scalar(func, bounds=(0,1))
http://docs.scipy.org/doc/scipy/reference/generated/scipy.optimize.minimize_scalar.html#scipy.optimize.minimize_scalar`
这些是否相等？
答案 0 :(得分：1)
有时它是，有时它不是。这取决于您定义的功能和您选择的方法。主要区别在于定义的using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace LOGINPAGE
{
public partial class Room : Form
{
public Room()
{
InitializeComponent();
PassText.PasswordChar = '*';
}
private void button2_Click(object sender, EventArgs e)
{
this.Close();
}
private void pictureBox1_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
this.Hide();
FloorSelection ss = new FloorSelection();
ss.Show();
}
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
}
private void EXIT_Click(object sender, EventArgs e)
{
this.Close();
Application.Exit();
}
private void xButton1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Mohamed\Documents\UserData.mdf;Integrated Security=True;Connect Timeout=30");
SqlDataAdapter sda = new SqlDataAdapter("Select Count (*) From dbo.[LOGIN] where username='" + UserText.Text + "' and Password ='" + PassText.Text + "'", con);
FloorSelection ss = new FloorSelection();
DataTable dt = new DataTable();
sda.Fill(dt);
if (dt.Rows[0][0].ToString() == "1")
{
SqlDataAdapter sda1 = new SqlDataAdapter("Select TYPE From dbo.[LOGIN] where username='" + UserText.Text + "' and Password ='" + PassText.Text + "'", con);
FloorSelection ss1 = new FloorSelection();
DataTable dt1 = new DataTable();
sda1.Fill(dt1);
if (dt1.Rows[0][0].ToString() == "FACULTY")
{
this.Hide();
FACULTY ff = new FACULTY();
ff.Show();
}
else if (dt1.Rows[0][0].ToString() == "ADMINISTRATOR")
{
this.Hide();
ADMINISTRATOR Ad = new ADMINISTRATOR();
Ad.Show();
}
else if (dt1.Rows[0][0].ToString() == "JANITOR")
{
this.Hide();
JANITOR jt = new JANITOR();
jt.Show();
}
else
{
MessageBox.Show("Please check your username and password");
}
}
}
private void label3_Click(object sender, EventArgs e)
{
label3.BackColor = Color.Transparent;
}
private void UserText_TextChanged(object sender, EventArgs e)
{
UserText.BackColor = Color.Empty;
}
private void PassText_TextChanged(object sender, EventArgs e)
{
PassText.BackColor = Color.Empty;
}
}
}
必须返回使用func的标量。我认为这是因为它允许它更快地返回结果。
有关更具体的解释，请参阅以下内容：
minimize_scalar如果要查看功能跟踪和最小位置，可以查看这些图。打印输出是：
from scipy import optimize
def func(x):
return (x - 2) * (x + 2)**2
def func2(x):
return (x - 2) * x * (x + 2)**2
min = 0
max = 1
res1 = optimize.fminbound(func, min, max)
res2 = optimize.minimize_scalar(func, bounds=(min,max))
res3 = optimize.fminbound(func2, min, max)
res4 = optimize.minimize_scalar(func2, bounds=(min,max))
print res1, res2.x
print res3, res4.x
import matplotlib.pyplot as plt
import numpy as np
xaxis = np.arange(-15,15)
plt.plot(xaxis, func(xaxis))
plt.plot(xaxis, func2(xaxis))
plt.scatter(res2.x, res2.fun)
plt.scatter(res4.x, res4.fun)
plt.show()