Elementwise multiplication, function definition
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Hello Community
I have an issue defining a function where the input is a meshgrid. Somehow there must be an issue with the elementwise multiplication.
Input: [x, y] = meshgrid(linspace(0,400,400),linspace(0,30000,400));
A1 = -8.269000000000000;
m1 = 2.071000000000000;
m2 = 0.239700000000000;
B1 = -13.100000000000000;
n1 = 2.813000000000000;
B2 = -49.960000000000001;
n2 = 18.170000000000002;
z1 = (10^A1*x.^m1*y.^m2+y.*(10^B1*x.^n1+10^B2*x.^n2))*100;
Output:
min(min(z1)) = 188.7492
Conclusion:
The minimal value of z1 is 188.7492. However looking at the equation, z1 should be 0 for x = 0 and y = 0.
Somehow there is a mistake writing the equation oder defining input (x,y)
Can anybody help me?
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采纳的回答
Iman Ansari
2013-5-17
[x, y] = meshgrid(linspace(0,400,400),linspace(0,30000,400));
A1 = -8.269000000000000;
m1 = 2.071000000000000;
m2 = 0.239700000000000;
B1 = -13.100000000000000;
n1 = 2.813000000000000;
B2 = -49.960000000000001;
n2 = 18.170000000000002;
z1 = (10^A1*x.^m1.*y.^m2+y.*(10^B1*x.^n1+10^B2*x.^n2))*100;
min(min(z1))
更多回答(1 个)
David Sanchez
2013-5-17
Hi, try your code like this:
[x, y] = meshgrid( linspace(0,400,400),linspace(0,30000,400) );
A1 = -8.269000000000000;
m1 = 2.071000000000000;
m2 = 0.239700000000000;
B1 = -13.100000000000000;
n1 = 2.813000000000000;
B2 = -49.960000000000001;
n2 = 18.170000000000002;
AA = 10^A1;
BB = x.^m1;
CC = y.^m2;
z1_1 = AA.*BB.*CC;
DD = 10^B1;
EE = x.^n1;
FF = 10^B2;
GG = x.^n2;
z1_2 = y.*( DD*EE + FF*GG );
z1 = ( z1_1 + z1_2 )*100;
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