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/426535/9015072
m ex2333.m
%例23-33 向量场图
[x,y,z]=peaks(20);
contour(x,y,z,10)
[u,v]=gradient(z);
hold on
quiver(x,y,u,v)
www.eeworm.com/read/382337/9035079
m q253.m
%《MATLAB在电子信息课程中的应用》第二章第五节演示程序三q253
% 彩色和动画
% 电子工业出版社出版 陈怀琛 吴大正 高西全合著 2001年10月
echo on,clf,axis equal, % 因为产生的图形是圆形,故把坐标设成相等比例
M = moviein(16); % 为变量M预留16幅图的存储空间
for j=1:16 % 作16次循环
plot(
www.eeworm.com/read/184304/9111126
m exm075~1.m
%exm07512_1.m
shg;clf;
[X,Y] = meshgrid([-2:.2:2]);
Z = 4*X.*exp(-X.^2-Y.^2);
G=gradient(Z);
subplot(1,2,1),surf(X,Y,Z,G)
subplot(1,2,2),h=surf(X,Y,Z,G);
rotate(h,[-2,-2,0],30,[2,2,0])
colorma
www.eeworm.com/read/184067/9123550
m quadeg1.m
%微积分例1:一元函数求导（diff,gradient)
clear;close;
x=-2*pi:0.1:2*pi;
y=sin(x);
dy=diff(y)./diff(x);
plot(x,y,x(1:length(x)-1),dy);
hold on;
yx =gradient(y,x);
plot(x,yx,'ro');
www.eeworm.com/read/184067/9123582
m quadeg2.m
%微积分例2:二元函数求导（gradient)
clear;close;
xa=-1:0.1:1;ya=-1:0.1:1;
[x,y]=meshgrid(xa,ya);
F=y.*x.^2+y.^3.*x;
[fx,fy]=gradient(F,xa,ya);
subplot(1,2,1);mesh(fx);
subplot(1,2,2);mesh(fy);
www.eeworm.com/read/378041/9252964
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/377912/9258211
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/375212/9369031
m cgrdsrch.m
function x=cgrdsrch(beta,kin,t,u)
%CGRDSRCH Conjugate gradient optimization for NNPLS
% Routine to carry out optimization using a conjugate gradient approach
% check is relative change in objective
www.eeworm.com/read/374416/9406910
m shili24.m
function shili24
h0=figure('toolbar','none',...
'position',[200 150 450 350],...
'name','实例24');
subplot(2,2,1)
z=peaks;
ribbon(z)
title('Figure1')
subplot(2,2,2)
[x,y,z]=peaks(15);
www.eeworm.com/read/374411/9407037
m llgrad.m
function [err1, err2] = llGrad(p1,p2,type,tolGrad,tolEval)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% [err1,err2] = llGrad(p1, p2, type [, tolGrad ,tolEva