How can I have the numbers in one vector after a while loop?

Question

Ang Vas 2015-6-10

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编辑： Stephen23 2015-6-10

Let say that I have a matrix A=[1 0 5 4; 2 0 5 4; 3 4 6 2]; and I am using the below code ( see my previews question Plot the numbers of a matrix as points (dots) in a plot) while any(A(:) > 0) [r,c] = find(A>0); X= randn; Y= randn; a=c+X b=r+Y A = A-1; end

it returns for a and b a =

b =

a =

b =

a =

b =

a =

b =

a =

6379
6379
6379

b =

2081
2081
2081

a =

3.6630

b =

3.5855

how can I have all the numbers of a and b in one vector respectively ?

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Stephen23 2015-6-10

编辑：Stephen23 2015-6-10

Ang Vas seems to be referring to these questions:

http://www.mathworks.com/matlabcentral/answers/222455-i-have-the-scatter-diagram-and-i-want-the-coordinates-of-each-point

http://www.mathworks.com/matlabcentral/answers/222006-plot-the-numbers-of-a-matrix-as-points-dots-in-a-plot

@Ang Vas: Can you please format your code properly, to make it more readable.

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Answer 1

Stephen23 2015-6-10

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此回答的直接链接

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编辑：Stephen23 2015-6-10

在 MATLAB Online 中打开

Although it is slightly different in operation, you could try this:

A = [1 0 5 4; 2 0 5 4; 3 4 6 2];
N = sum(A(:));
X = randn(N,1)/12;
Y = randn(N,1)/12;
[R,C] = find(A>0);
B = A(A>0);
X = X + cell2mat(arrayfun(@(z,m)repmat(z,m,1),C,B,'UniformOutput',false));
Y = Y + cell2mat(arrayfun(@(z,m)repmat(z,m,1),R,B,'UniformOutput',false));
scatter(X,Y,[],randperm(N),'filled')
axis(gca,'ij')
colormap('winter')

which generates this figure:

The main differences from your code is that it generates all values at once (in the vectors X and Y) rather than within a loop, and it also uses a different random position for each point (rather than applying one random value to all points at each step of the while-loop). The code assumes that all values of A are positive integers or zero.

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Ang Vas 2015-6-10

I am so sorry about this!!!. I am amateur in matlab and i am still haven't found my roots with it . Thanks a lot for you help

Stephen23 2015-6-10

编辑：Stephen23 2015-6-10

There is nothing wrong with being a beginner! Everyone here on this forum was once a beginner... it just takes time and lots of practice to learn a tool like MATLAB: