请问如何用MATLAB画出上面的图像,有一维函数 function y = mylp(x,p,lambda)
% lp penalty
x1 = abs(x) ;
epsilon = 0.001 ;
y = sign(x)lambda(x1+epsilon).^p ;
x1 = abs(x) ;
epsilon = 0.001 ;
y = sign(x)lambda(x1+epsilon).^p ;
你好,要生成一幅三维图,需要类似于Z=F(x,y)或者G(x,y,z)=0的表达式才行:
下面做个示范
[x,y] = meshgrid(-1:0.01:1);
x1 = abs(x) ;
epsilon = 0.001 ;
lambda = 1;
p = 0.5;
z = sign(x)*lambda*(x1.*abs(y)+epsilon).^p ;
h = surf(x,y,z);
set(h,'edgecolor','none','facecolor','r')
鉴于没有找到相关表达式,你的疑问需要补充资料