plotting 3d graph

20 Ansichten (letzte 30 Tage)
priya
priya am 5 Jul. 2021
Kommentiert: priya am 5 Jul. 2021
I have a surface, with a function Z plotted as a function of two variables X and Y. The code is:
x = -100:25:100 ;
y = 600:120:1500 ;
[X, Y] = meshgrid(x, y);
Z = 3 *X + 2 ./(Y);
surf(X, Y, Z);
I want to plot the minimum of function Z plotted on the x-axis, for every value of Y.
Something like this (the red line and green marks).
Please help.
I want to plot this:
for y =600, the minimum value of z is -300 at x= -100; plot (x=-100, z=-300)
then for y = 720, the minimum value of z is -300 at x= -100; plot (x=-100, z=-300)
and so on.
Pleas help.

Akzeptierte Antwort

Amit Bhowmick
Amit Bhowmick am 5 Jul. 2021
x = -100:25:100 ;
y = 600:120:1500 ;
[X, Y] = meshgrid(x, y);
Z = 3 *X + 2 ./(Y);
surf(X, Y, Z);
fminx=min(abs(Z),[],1)
fminy=min(abs(Z),[],2)
hold;
plot3(zeros(size(y)),y,fminy','ro')
  3 Kommentare
Amit Bhowmick
Amit Bhowmick am 5 Jul. 2021
[fminx,idx]=min(Z,[],1)
[fminy,idy]=min(Z,[],2)
hold;
plot3(X(:,idy),Y(:,idy),fminy,'ro')
priya
priya am 5 Jul. 2021
Thanks a lot !!

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (0)

Kategorien

Mehr zu 2-D and 3-D Plots finden Sie in Help Center und File Exchange

Produkte


Version

R2017a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by