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From: sassiric on 2 Aug 2010 05:29
Hello to everybody! I have to plot a matrix 10111 x 3 where the first two columns are the points' coordinates and the third column is the value of the point. With that matrix i have take a grid to approximate the plan's portion [0...10,0...10]:

0 0 0,162093682194603
0 0,1 0,165728548002140
0 0,2 0,167755607990236
...
10 9,8 0,0535482539857293
10 9,9 0,0528223670673184
10 10 0,0519024643636819

I hope you understand the meaning of the matrix.
I want to print a graph 3D or 2D with different colours to see where in the plan 10x10 i reach highest value and where the lowest value are localized.
Thank you very much.
From: us on 2 Aug 2010 09:30
"dasdasd asdasdasd" <dhcyrtlbd(a)cmcidj.com> wrote in message <i36gml$4gg$1(a)fred.mathworks.com>...
> Hello to everybody! I have to plot a matrix 10111 x 3 where the first two columns are the points' coordinates and the third column is the value of the point. With that matrix i have take a grid to approximate the plan's portion [0...10,0...10]:
>
> 0 0 -0,162093682194603
> 0 0,1 -0,165728548002140
> 0 0,2 -0,167755607990236
> ...
> 10 9,8 0,0535482539857293
> 10 9,9 0,0528223670673184
> 10 10 0,0519024643636819
>
> I hope you understand the meaning of the matrix.
> I want to print a graph 3D or 2D with different colours to see where in the plan 10x10 i reach highest value and where the lowest value are localized.
> Thank you very much.

a hint:

help scatter;

us
From: us on 2 Aug 2010 09:41
sassiric <sassi.riccardo(a)gmail.com> wrote in message <1108869274.41517.1280755795217.JavaMail.root(a)gallium.mathforum.org>...
> Hello to everybody! I have to plot a matrix 10111 x 3 where the first two columns are the points' coordinates and the third column is the value of the point. With that matrix i have take a grid to approximate the plan's portion [0...10,0...10]:
>
> 0 0 0,162093682194603
> 0 0,1 0,165728548002140
> 0 0,2 0,167755607990236
> ..
> 10 9,8 0,0535482539857293
> 10 9,9 0,0528223670673184
> 10 10 0,0519024643636819
>
> I hope you understand the meaning of the matrix.
> I want to print a graph 3D or 2D with different colours to see where in the plan 10x10 i reach highest value and where the lowest value are localized.
> Thank you very much.

do NOT double post...

us
From: sassiric on 2 Aug 2010 10:47
Sorry for the double.

I tried with:
scatter3(Z(:,1),Z(:,2),Z(:,3))

but the result is not as i hope. I want to underline the region where the values are highest using different colours. The best is a 2D graph. I tried also with the scatter function but it needs only two parameters in input.
From: us on 2 Aug 2010 15:13
sassiric <sassi.riccardo(a)gmail.com> wrote in message <1600095594.43361.1280774873550.JavaMail.root(a)gallium.mathforum.org>...
> Sorry for the double.
>
> I tried with:
> scatter3(Z(:,1),Z(:,2),Z(:,3))
>
> but the result is not as i hope. I want to underline the region where the values are highest using different colours. The best is a 2D graph. I tried also with the scatter function but it needs only two parameters in input.

one of the solutions
- note: you're not using the correct syntax to add color information...

[x,y,z]=peaks(32);
cm=jet(numel(z)); % <- use your own color map...
scatter3(x(:),y(:),z(:),[],cm);

us
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