plot of differernt regions in a matrix

2011 6 21
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I have 2 matrixes with the same dimension(100,200). the structure of one the matrixes is something like as follows: class1{row=1:3 and j=4:7>>value=2} class2{row=1:3 and j=8:8>>value=3} class3{row=10:12 and j=150:160>>value=2} class4{row=80:90 and j=150:160>>value=3}
I want to make a plot of pixels in matrix2 which have a value 2 in matrix1 but show them as differnt classes. class 1 has 12 values and class 3 has 33 values. i want a plot which on X axis from 1 to 12 is shown as class 1 and from 13 to 13+33 as class3. I'm not sure if I asked my question clearly, but please let me know if it's not clear. I appereciate your help.

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Andrei Bobrov
Andrei Bobrov 2011-6-21

1 个投票

m1 = rand(100,200);
m2 = zeros(size(m1));
m2(1:3,4:7)=2;
m2(10:12,150:160)=2;
m2(1:3,8)=3;
m2(80:90,150:160)=3;
L = bwlabel(m2 == 2);
[r c v] = find(L);
wmtx = sortrows([r c v],3);
plot(1:size(wmtx,1),m1(sub2ind(size(m1),wmtx(:,1),wmtx(:,2))));
ADD on comment
pm1 = m1(sub2ind(size(m1),wmtx(:,1),wmtx(:,2)));
dplt = mat2cell([(1:size(wmtx,1))' pm1],...
arrayfun(@(i1)nnz(wmtx(:,3)==i1),1:max(wmtx(:,3))) ,ones(1,2));
plot(dplt{1,:},'r*-',dplt{2,:},'go-')
corrected 'plot(...'
n = size(wmtx,1);
k=reshape('ymcrgbwk+o*.xv^>--------',[],3);
dplt2 = [dplt mat2cell([repmat(k,fix(n/8),1);k(1:rem(n,8),:)],ones(n,1),3)]';
plot(dplt2{:})
COD of last correcting
L = bwlabel(m2 == 2);
[r c v] = find(L);
wmtx = sortrows([r c v],3);
pm1 = m1(sub2ind(size(m1),wmtx(:,1),wmtx(:,2)));
dplt = mat2cell([(1:size(wmtx,1))' pm1],...
arrayfun(@(i1)nnz(wmtx(:,3)==i1),1:max(wmtx(:,3))) ,ones(1,2));
n = size(dplt,1);
k=reshape('ymcrgbwk+o*.xv^>--------',[],3);
dplt2 = [dplt mat2cell([repmat(k,fix(n/8),1);k(1:rem(n,8),:)],ones(n,1),3)]';
plot(dplt2{:})

10 个评论
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Hassan
Hassan 2011-6-21
thanks a lot Andrei. It's the one I need. The only missing thing which is also important for me is if I can show differernt regions with differernt color in the plot. for example if the whole range of values on X-axis is 1 to 45 and say 1 to 5 is the first connected values and 6 to 20 is the second one, I can show each of them with a seperate color.
Hassan
Hassan 2011-6-21
the add on code works for the example u used but it not working for my data. I have more than 200 regions with value 2 in differernt part of image.
Andrei Bobrov
Andrei Bobrov 2011-6-21
Present the data (small part) to which the code is not working
Hassan
Hassan 2011-6-21
I'd like to but I dont know how to present the data. I dont think I can import the data here, can I?
Hassan
Hassan 2011-6-21
in dplt variable i have 323*2cell.
Andrei Bobrov
Andrei Bobrov 2011-6-21
create three matrixs: 1. m1; 2. value; 3. class;
Hassan
Hassan 2011-6-22
Sorry but I dont understand it.
Hassan
Hassan 2011-6-22
I got the following error:
??? Error using ==> horzcat
CAT arguments dimensions are not
consistent.
Andrei Bobrov
Andrei Bobrov 2011-6-22
Sorry! It's my typo! Correcting in 'k = [...'
Hassan
Hassan 2011-6-23
thanks a lot Andrei.

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