How can I plot data in one matrix and color the data differently using data from another matrix?

Hi !

I have a matrix with "data" with size n by 2. this matrix rows contain some value that I want to plot.

and another matrix with size "R" n by k. this matrix contain ones and zero. the sum of each row is one.

the matrix R indicate each row of data follows which colunm out of the k columns.

for example:

data =[1 2; 2 4 ; 3 6;4 7];
R= [0 1 0 0; 0 0 1 0; 0 1 0 0; 1 0 0 0];

now I want to plot the matrix data

plot(data(:,1),data(:,2),'o');

but I want the points colours to be diffrent according to which column of R contain the 1.

in the example I will have the 1st data points and the last ones with the same color. and the others are diffrent.

also the number of columns in R = k >= 2 ( but not necessarily 3)

How can I do this ??

thank you.

Answer 1

[KSSV]

data =[1 2; 2 4 ; 3 6;4 7];
R= [0 1 0; 0 0 1; 0 1 0; 1 0 0];
figure

hold on
for i = 1:size(data,1)
    plot(data(i,1),data(i,2),'.','MarkerSize',50,'color',R(i,:))
end

Have a look on scatter also.

[Nora Khaled]

Thank you for your answer!

but what do I do if R is 2 columns or 4. cause this get me an error that the color must be 3 values.

[KSSV]

R must have three columns......as color stands for RGB color code.

[Nora Khaled]

I have matrix R indicating the group the each row of data is in. So, it can be 2,3,4,...

and I want the color of each group of data to be the same.

I did edit the question to make it more clear.

Thank you.