## Solve and plot system in x and y with varying constants e and t

hello,

i am having troubles solving the following problem:

solve and plot for x and y

x+y+e+t>=0

And

x*y-e*t>=0

where x and y are the two variables while e and t are two constants whose values has to vary in a range: i am trying to see the effect of e and t on the system represented by x and y.

basically i would like to obtain on the same graph different curves in x and y for a fixed number of combinations of e and t.

my code so far is:

n= 21;

x = linspace(-100, 100, n);

y = linspace(-100, 100, n);

[X, Y] = meshgrid(x, y);

a = 50;

b = 5;

e = linspace(-a, a, b);

t = linspace(-a, a, b);

Z = zeros(n, n);

for k = 1:b

for s = 1:b

b = X + Y + e(k) + t(s);

d = X.*Y – e(k).*t(s);

for i= 1:n

for j= 1:n

if b(i,j) >= 0

Z(i,j) = d(i,j);

else

Z(i,j) = -1;

end

end

v = [0, 0];

contour(X, Y, Z, v, ‘LineWidth’, 1.5)

grid on

hold on

end

end

end

could anybody please give me any suggestions on how to improve it, as the result so far is not what i expect.

thank you very muchhello,

i am having troubles solving the following problem:

solve and plot for x and y

x+y+e+t>=0

And

x*y-e*t>=0

where x and y are the two variables while e and t are two constants whose values has to vary in a range: i am trying to see the effect of e and t on the system represented by x and y.

basically i would like to obtain on the same graph different curves in x and y for a fixed number of combinations of e and t.

my code so far is:

n= 21;

x = linspace(-100, 100, n);

y = linspace(-100, 100, n);

[X, Y] = meshgrid(x, y);

a = 50;

b = 5;

e = linspace(-a, a, b);

t = linspace(-a, a, b);

Z = zeros(n, n);

for k = 1:b

for s = 1:b

b = X + Y + e(k) + t(s);

d = X.*Y – e(k).*t(s);

for i= 1:n

for j= 1:n

if b(i,j) >= 0

Z(i,j) = d(i,j);

else

Z(i,j) = -1;

end

end

v = [0, 0];

contour(X, Y, Z, v, ‘LineWidth’, 1.5)

grid on

hold on

end

end

end

could anybody please give me any suggestions on how to improve it, as the result so far is not what i expect.

thank you very much hello,

i am having troubles solving the following problem:

solve and plot for x and y

x+y+e+t>=0

And

x*y-e*t>=0

where x and y are the two variables while e and t are two constants whose values has to vary in a range: i am trying to see the effect of e and t on the system represented by x and y.

basically i would like to obtain on the same graph different curves in x and y for a fixed number of combinations of e and t.

my code so far is:

n= 21;

x = linspace(-100, 100, n);

y = linspace(-100, 100, n);

[X, Y] = meshgrid(x, y);

a = 50;

b = 5;

e = linspace(-a, a, b);

t = linspace(-a, a, b);

Z = zeros(n, n);

for k = 1:b

for s = 1:b

b = X + Y + e(k) + t(s);

d = X.*Y – e(k).*t(s);

for i= 1:n

for j= 1:n

if b(i,j) >= 0

Z(i,j) = d(i,j);

else

Z(i,j) = -1;

end

end

v = [0, 0];

contour(X, Y, Z, v, ‘LineWidth’, 1.5)

grid on

hold on

end

end

end

could anybody please give me any suggestions on how to improve it, as the result so far is not what i expect.

thank you very much system of equations, plotting, iteration MATLAB Answers — New Questions