how to plot a matrix values in 3d plot

how to plot a matrix values in 3d plot

x=[0.2:0.5:0.8:1:1.5]

y=[0:0.2:0.4:0.6:0.8]

I got the matrix z=matrix(5x5) values from excel and each values correspond to x and y.

Answer 1

[Star Strider]

It would be nice to have the ‘z’ matrix as well, however in its absence, I will create one.

x=[0.2;0.5;0.8;1;1.5];
y=[0;0.2;0.4;0.6;0.8];
z = x*y.';;

figure
surf(x, y, z)
grid on
xlabel('x')
ylabel('y')

Use semicolons (;) not colons (:) to do vertical concatenation. They are two entirely different operators, and are used for entirely different purpoases.

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[abdelmadjid benrabah]

thanks for your reply, I'll explain you what I want to get and I will thankful if you could help me

as you can see in the table all values are for each x and y, I got them in from excel. and for each x=0.2 x=0.5 x=0.8 x=1 x=1.5 I have the corresponding valuse of y=0 y=0,2 y=0,4 y=0,6 y=0,8 .

i need to plot those result as 3d graph

X=0.2 0.5 0.8 1 1.5 and Y=0 0.2 0.4 0.6 0.8 and Z is the values in the table

i tried to make this matriz but i doesnt work

z =[0.3330 0.3331 0.3331 0.3330 0.3331;

0.2680 0.2683 0.2683 0.2683 0.2683;

0.2011 0.2012 0.2012 0.2011 0.2011;

0.1333 0.1334 0.1336 0.1335 0.1335;

0.0669 0.0672 0.0671 0.0672 0.0671];

[Star Strider]

It works for me.

Try this —

x=[0.2;0.5;0.8;1;1.5];
y=[0;0.2;0.4;0.6;0.8];
z =[0.3330 0.3331 0.3331 0.3330 0.3331; 
    0.2680 0.2683 0.2683 0.2683 0.2683;
    0.2011 0.2012 0.2012 0.2011 0.2011;
    0.1333 0.1334 0.1336 0.1335 0.1335;
    0.0669 0.0672 0.0671 0.0672 0.0671];

figure
surf(x, y, z)
grid on
xlabel('x')
ylabel('y')
view(75,30)

What else do you wnat it to do?

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[abdelmadjid benrabah]

thank you so much,

I got it, I will see if I need someting else I will contact you.

[Star Strider]

As always, my pleasure!

I will do my best to provied useful solutions.

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