How to plot planes parallel to the coordinate axes given by

How to plot planes parallel to the coordinate axes given by

y = linspace(0,5) ; 
x = linspace(0,5) ;
[Y,X] = meshgrid(y,x) ; 
Z = 3 ; 
surf(X,Y,Z)
hold on
x = linspace(0,5) ; 
z = linspace(0,5) ;
[Z,X] = meshgrid(z,x) ; 
Y = 2 ; 
surf(X,Y,Z)
hold on
y = linspace(0,5) ; 
z = linspace(0,5) ;
[Z,Y] = meshgrid(z,y) ; 
X = 1 ; 
surf(X,Y,Z)

Answer 1

[Voss]

y = linspace(0,5) ; 
x = linspace(0,5) ;
[Y,X] = meshgrid(y,x) ; 
% Z = 3 ; 
Z = 3*ones(size(X)); 
surf(X,Y,Z)
hold on

x = linspace(0,5) ; 
z = linspace(0,5) ;
[Z,X] = meshgrid(z,x) ; 
% Y = 2 ; 
Y = 2*ones(size(X)); 
surf(X,Y,Z)
hold on

y = linspace(0,5) ; 
z = linspace(0,5) ;
[Z,Y] = meshgrid(z,y) ; 
% X = 1 ;
X = ones(size(Y)); 
surf(X,Y,Z)

[Atom]

Thanks a lot. what is ones(size(X))

[Voss]

A matrix of ones the same size as X. This is done because X, Y, and Z need to be compatible sizes in surf (in this case I'm making X, Y, and Z all the same size).

References: ones, size