MATLAB Answers

how to plot surface for this problem.

Asked by Nitish Chopra

Nitish Chopra (view profile)

on 14 May 2018
Latest activity Commented on by Nitish Chopra

Nitish Chopra (view profile)

on 14 May 2018
a=[ 0.042 0.056 0.082]
b=[45 50 56]
c=[10 15 35]
Xmin=[ 10 45 60]
Xmax=[ 100 200 150]
F=a*X^2 +b*X+c
how to plot surface( visualize) for "F" function versus X for different values of X over different iterations

0 Comments

Sign in to comment.

2 Answers

Answer by KSSV

KSSV (view profile)

on 14 May 2018

a=[ 0.042 0.056 0.082] ;
b=[45 50 56] ;
c=[10 15 35] ;
Xmin=[ 10 45 60] ;
Xmax=[ 100 200 150] ;
n = length(a) ;
N = 100 ;
F=@(a,b,c,X) a*X.^2 +b*X+c ;
figure
hold on
for i = 1:n
x = linspace(Xmin(i),Xmax(i),N) ;
[X,Y] = meshgrid(x,x) ;
Fi = F(a(i),b(i),c(i),X) ;
surf(X,Y,Fi) ;
end

Nitish Chopra

Nitish Chopra (view profile)

on 14 May 2018
thanks for reply, but it didn't served the purpose. i am expecting output like this figure
Nitish Chopra

Nitish Chopra (view profile)

on 14 May 2018
data=[0.03546 38.30553 1243.5311 35 210 0.02111 36.32782 1658.5696 130 325 0.01799 38.27041 1356.6592 125 315]; a1=data(:,1); b1=data(:,2); c1=sum(data(:,3)); Pmin=data(:,4)';%/*lower bounds of the parameters. */ Pmax=data(:,5)';
F=P1.*P1*a1+P1*b1+c1;
these are values of F which I got after 10 iterations F=[25473.6648344552 25469.7808522268 25466.1716596841 25466.1716596841 25466.1716596841 25466.1716596841 25466.1716596841 25466.1716596841 25466.1716596841 25466.1147025374] how can I visualize F=P1.*P1*a1+P1*b1+c1; in surface

Sign in to comment.

Aakash Deep (view profile)

Answer by Aakash Deep

Aakash Deep (view profile)

on 14 May 2018

I am assuming that your matrix X has a dimension nx3 where n can be your iterations. After executing your function command F=a*X^2 +b*X+c this will produce F with the same dimension as X. Now you can plot it using the surface plot command surf(F). I hope this will help.

0 Comments

Sign in to comment.