PLOT surface using 3 vectors of same length (NEED HELP!!!)
1 view (last 30 days)
Show older comments
please i have managed to make 3 vectors but i want to plot a 3D surface. what am i surposed to do?
b=0;
for i = -200:1:200
for j = -90:0.45:90
b=1+b;
lambda(b) = i;
beta(b) = j;
lambdai =(((lambda(b)+(0.08*beta(b))))*((beta(b)^3)+1))/((beta(b)^3)+1-(0.035*(lambda(b)+(0.08*beta(b)))));
pwrcoff = 0.5109*((116/lambdai)-(0.4*beta(b))-5)*exp(-21/lambdai);
P(b) = 0.5*1.2754*12469*63*55^2*pwrcoff;
end
end
0 Comments
Answers (2)
Star Strider
on 13 Sep 2022
The code produces vectors, so I would simply reshape them, using the number of unique elements in ‘i’ to determine one of the dimensions —
b=0;
for i = -200:1:200
for j = -90:0.45:90
b=1+b;
lambda(b) = i;
beta(b) = j;
lambdai =(((lambda(b)+(0.08*beta(b))))*((beta(b)^3)+1))/((beta(b)^3)+1-(0.035*(lambda(b)+(0.08*beta(b)))));
pwrcoff = 0.5109*((116/lambdai)-(0.4*beta(b))-5)*exp(-21/lambdai);
P(b) = 0.5*1.2754*12469*63*55^2*pwrcoff;
end
end
% lambda
% beta
% P
RowSize = numel(-200:1:200);
lambdam = reshape(lambda, RowSize,[]);
betam = reshape(beta, RowSize, []);
Pm = reshape(P, RowSize,[]);
Pm = Pm .* ((Pm >= -50) & (Pm <= +5));
figure
surf(lambdam, betam, Pm, 'EdgeColor','none')
grid on
xlabel('\lambda')
ylabel('\beta')
zlabel('P')
.
0 Comments
Bjorn Gustavsson
on 13 Sep 2022
You can use multiple indices in the variables you create. For example if you do things like this:
b=0;
for i = -200:1:200
for j = -90:0.45:90
b=1+b;
lambda(i,j) = i;
end
end
You will create 2-D arrays, that you can then use with for example pcolor.
HTH
0 Comments
See Also
Categories
Find more on Surface and Mesh Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!