求助用matlab画出一个函数的等高线f(x1,x2)=exp(x1+3*x2-0.1) + exp(x1-3*x2-0.1) + exp(-x1 - 0.1)我的程序是这样的:[X,Y] = meshgrid((-10:1:10),(-10:1:10));Z = exp(X+3.*Y-0.1)+exp(X-3.*Y-0.1)+exp(-X-0.1);%Z = X.*exp(-X.^2-Y.^2);[C,h]
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 20:52:23
![求助用matlab画出一个函数的等高线f(x1,x2)=exp(x1+3*x2-0.1) + exp(x1-3*x2-0.1) + exp(-x1 - 0.1)我的程序是这样的:[X,Y] = meshgrid((-10:1:10),(-10:1:10));Z = exp(X+3.*Y-0.1)+exp(X-3.*Y-0.1)+exp(-X-0.1);%Z = X.*exp(-X.^2-Y.^2);[C,h]](/uploads/image/z/13829276-20-6.jpg?t=%E6%B1%82%E5%8A%A9%E7%94%A8matlab%E7%94%BB%E5%87%BA%E4%B8%80%E4%B8%AA%E5%87%BD%E6%95%B0%E7%9A%84%E7%AD%89%E9%AB%98%E7%BA%BFf%28x1%2Cx2%29%3Dexp%28x1%2B3%2Ax2-0.1%29+%2B+exp%28x1-3%2Ax2-0.1%29+%2B+exp%28-x1+-+0.1%29%E6%88%91%E7%9A%84%E7%A8%8B%E5%BA%8F%E6%98%AF%E8%BF%99%E6%A0%B7%E7%9A%84%EF%BC%9A%5BX%2CY%5D+%3D+meshgrid%28%28-10%3A1%3A10%29%2C%28-10%3A1%3A10%29%29%3BZ+%3D+exp%28X%2B3.%2AY-0.1%29%2Bexp%28X-3.%2AY-0.1%29%2Bexp%28-X-0.1%29%3B%25Z+%3D+X.%2Aexp%28-X.%5E2-Y.%5E2%29%3B%5BC%2Ch%5D)
求助用matlab画出一个函数的等高线f(x1,x2)=exp(x1+3*x2-0.1) + exp(x1-3*x2-0.1) + exp(-x1 - 0.1)我的程序是这样的:[X,Y] = meshgrid((-10:1:10),(-10:1:10));Z = exp(X+3.*Y-0.1)+exp(X-3.*Y-0.1)+exp(-X-0.1);%Z = X.*exp(-X.^2-Y.^2);[C,h]
求助用matlab画出一个函数的等高线
f(x1,x2)=exp(x1+3*x2-0.1) + exp(x1-3*x2-0.1) + exp(-x1 - 0.1)
我的程序是这样的:
[X,Y] = meshgrid((-10:1:10),(-10:1:10));
Z = exp(X+3.*Y-0.1)+exp(X-3.*Y-0.1)+exp(-X-0.1);
%Z = X.*exp(-X.^2-Y.^2);
[C,h] = contour(X,Y,Z, 15);
但画出来十分奇怪,不知道为何
求助用matlab画出一个函数的等高线f(x1,x2)=exp(x1+3*x2-0.1) + exp(x1-3*x2-0.1) + exp(-x1 - 0.1)我的程序是这样的:[X,Y] = meshgrid((-10:1:10),(-10:1:10));Z = exp(X+3.*Y-0.1)+exp(X-3.*Y-0.1)+exp(-X-0.1);%Z = X.*exp(-X.^2-Y.^2);[C,h]
你的程序没问题,问题在于这个函数的图像比较怪,你可以试试:
ezmesh('exp(x1+3*x2-0.1) + exp(x1-3*x2-0.1) + exp(-x1 - 0.1)')
画等高线也可以使用下面的做法:
ezcontour('exp(x1+3*x2-0.1) + exp(x1-3*x2-0.1) + exp(-x1 - 0.1)')
建议:
1、确定函数表达式有没问题;
2、如果函数没问题,建议选择一个合理的绘图坐标范围.