代码搜索：gradient
找到约 2,951 项符合「gradient」的源代码
代码结果 2,951
www.eeworm.com/read/272953/10935662
m exn527a.m
%《MATLAB及其在理工课程中的应用指南》(十一五规划版)第五章例5-2-7a
% 用梯度图形分析空间曲面的极值点
% 西安电子科技大学出版社出版 陈怀琛编著 2007年5月
clear
[x,y]=meshgrid([-5:0.5:3],[-3:0.5:5]);
z=x.^3-y.^3+3*x.^2+3*y.^2-9*x;
contour(x,y,z,20), colorba
www.eeworm.com/read/417350/10993229
txt 08-22.txt
%例8-22 使用quiver函数绘制箭头图形。
>> % 该程序用于绘制箭头图形
>> [x,y] = meshgrid(-2:.2:2,-1:.15:1);
>> z = x .* exp(-x.^2 + y.^2);
>> [px,py] = gradient(z,.2,.15);
>> contour(x,y,z)
>>hold on
>> quiver(x,y,px
www.eeworm.com/read/417350/10993397
txt 06-22.txt
例6-22 使用gradient函数求近似梯度。
解：在命令窗口中输入如下命令，并按Enter键确认。
>> [x,y] = meshgrid(-2:.2:2, -2:.2:2);
>> z = x .* exp(-x.^2 - y.^2);
>> [px,py] = gradient(z,.2,.2);
>> contour(z)
>> hold on
>> quiver(px,
www.eeworm.com/read/381420/6957353
m ex233.m
%********************************************************
%程序：EX233.M
%功能：向量场图绘制函数quiver使用实例
%********************************************************
[x,y,z]=peaks(30); %绘制peaks图形
contour
www.eeworm.com/read/469416/6976348
m rosegrad.m
function g = rosegrad(x)
%ROSEGRAD Calculate gradient of Rosenbrock's function.
%
% Description
% G = ROSEGRAD(X) computes the gradient of Rosenbrock's function at
% each row of X, which should h
www.eeworm.com/read/469416/6976413
m graddesc.m
function [x, options, flog, pointlog] = graddesc(f, x, options, gradf, ...
varargin)
%GRADDESC Gradient descent optimization.
%
% Description
% [X, OPTIONS, FLOG, POINTLOG] = GRADDESC(F, X, OP
www.eeworm.com/read/469046/6984159
m 6-26.m
[X,Y] = meshgrid(-2:.2:2);
Z = X.*exp(-X.^2 - Y.^2);
[DX,DY] = gradient(Z,.2,.2);
%梯度计算
contour(X,Y,Z)
%轮廓图绘制
hold on
quiver(X,Y,DX,DY)
%箭头图绘制
grid off
hold off
title '二维箭头图示例'
www.eeworm.com/read/465867/7047829
m ex233.m
%********************************************************
%程序：EX233.M
%功能：向量场图绘制函数quiver使用实例
%********************************************************
[x,y,z]=peaks(30); %绘制peaks图形
contour