How I plot this ?
显示 更早的评论
Please help me to plot this equation
Thanks in advance
log((1+alpha1*x/(1+alpha2*y))) -gamma*log((1+beta1*x/(1+beta2*y)));
alpha1=0.1; alpha2=0.2; beta1=0.2; beta2=1; gamma=1.3;
采纳的回答
Here is one way:
alpha1=0.1; alpha2=0.2; beta1=0.2; beta2=1; gamma=1.3;
x = 0 : 0.1 : 10;
y = 0 : 0.1 : 10;
[xx,yy] = meshgrid(x,y);
f = log((1+alpha1*xx./(1+alpha2*yy))) -gamma*log((1+beta1*xx./(1+beta2*yy)));
figure
surf(x,y,f)
2 个评论
Answering the comment you placed here, then deleted.
alpha1=0.1; alpha2=0.2; beta1=0.2; beta2=1; gamma=1.3;
x = 0 : 0.1 : 10;
y = 0 : 0.1 : 10;
[xx,yy] = meshgrid(x,y);
f = zeros(size(xx));
figure
surf(x,y,f)
(I saw that you also emailed me, but I don't answer via email, so better to post here.)
Hossein Alishahi
2021-3-4
更多回答（1 个）
alpha1=0.1; alpha2=0.2; beta1=0.2; beta2=1; gamma=1.3;
f = @(x,y) log((1+alpha1*x./(1+alpha2*y))) -gamma*log((1+beta1*x./(1+beta2*y)));
figure
fimplicit(f,[0 100 0 10]) % Chose these plot limits after a little experimentation
2 个评论
Hossein Alishahi
2021-3-6
I have below code
%% Input Values
clear all
clc
alpha1=input('Enter positive "alpha1"?');
alpha2=input('Enter positive "alpha2"?');
beta1=input('Enter positive "beta1"?');
beta2=input('Enter positive "beta2"?');
lambda=input('Enter positive "lambda"?');
eta1=input('Enter positive "eta1"?');
eta2=input('Enter positive "eta2"?');
P=input('Enter positive "P"?');
%% Feasible Area
x = -1:P;m = 0; c = eta2; y = m * x + c;
plot(x, y, 'black')
y = -1:P; m = 0; c = eta1; y = m * x + c;
plot(y, x, 'black')
eta1=min (eta1,P); eta2=min (eta2,P);
if eta1==0 && eta2==0;
X=[0 0 P]; Y=[0 P 0];
fill(X,Y,[0.85 0.85 0.85]); axis([-1 P -1 P])
end
if eta1+eta2<P
X=[0 0 eta1 eta1]; Y=[0 eta2 eta2 0];
fill(X,Y,[0.85 0.85 0.85]);
else
X=[0 0 P-eta2 eta1 eta1]; Y=[0 eta2 eta2 P-eta1 0];
fill(X,Y,[0.85 0.85 0.85]); axis([-1 P -1 P])
end
X=[0 0]; Y=[0 P];
line(X,Y,'Color','black')
hold on
line(Y,X,'Color','black')
g = @(x,y) x+y-P;
y1=fimplicit(g,[0 P 0 P])
f = @(x,y) log((1+alpha1*x./(1+alpha2*y))) -lambda*log((1+beta1*x./(1+beta2*y)));
y2=fimplicit(f,[-1 P -1 P], '-')
hold on
grid on
Where I consider alpha1=1, alpha2=0.2, beta1=1; beta2=2, lambda=2, eta1=2, eta2=3, P=1
I want to find the intersection for lines in the picture. Could you please help me!
the cyclist
2021-3-6
You might want to post a new question, so more people see this. I don't see the answer right away, and I don't think I'm going to get a chance to think about it more for a while.
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