Plot Matrix Columns in a Loop

I have matrix X which is 225 by 6. And vector y which is 225 by 1. y is a binary with values 0 or 1. What I need to accomplish is to plot every column in X with y seperately.

Just a short example For instance:

x1    x2      x3      (x4 -x6)etc     y
26    0,01    -1,15                   0
25    0,025   1,58                    1
20    0,185   2,57                    1

I need to plot x1 with y, x2 with y etc... for pos=find(y==1) and neg=find(y==0)

I only accomplished to plot all column with y. But the is not satisfactory because the columns in X have different ranges of values.

*function plotData(X,y)*

pos = find(y==1);
neg = find(y==0);

plot(X(pos,1),X(pos,2),X(pos,3),X(pos,4),X(pos,5),X(pos,6),'kx','MarkerSize',5,'Color','s')
hold on
plot(X(neg,1),X(neg,2),X(neg,3),X(neg,4),X(neg,5),X(neg,6),'ko','MarkerSize',5,'Color','r')

*end*

But this way it plots all columns at once. How can I do it seperately?

Thanks in advance.

[José-Luis]

I don't get it. You already have the logical index:

 plot(x(y,:))
 hold on
 plot(x(~y,:))

What really baffles me is what you expect this plot to show: what is the reason for this indexing?

[JacquelineK]

Hi José,

y is a binary. So I want to plot lets say the FirmSize of my companies with y to see how the values of one x scatters "between" y=0 and y=1.

[José-Luis]

I still don't follow. You won't get a "scatter" unless by pure random luck there's an equal number of zeros and ones in y.

[JacquelineK]

I plotted each x with y now. This is what I got for FirmSize.

It is still not what I imagined, but better than before :)

Answer 1

[Jose Marques]

Hello, Jacqueline Kpognon. Do you want to differents figures? Try this:

    pos = find(y==1);
    neg = find(y==0);
    plot(X(pos,1),X(pos,2),X(pos,3),X(pos,4),X(pos,5),X(pos,6),'kx','MarkerSize',5,'Color','s')
    figure();
    plot(X(pos,1),X(pos,2),X(pos,3),X(pos,4),X(pos,5),X(pos,6),'ko','MarkerSize',5,'Color','r')

[JacquelineK]

Hello Jose,

I wrote a mistake there. First plot is for x(pos) and second plot is for x(neg).

 plot(X(pos,1),X(pos,2),X(pos,3),X(pos,4),X(pos,5),X(pos,6),'kx','MarkerSize',5,'Color','s')
 plot(X(neg,1),X(neg,2),X(neg,3),X(neg,4),X(neg,5),X(neg,6),'ko','MarkerSize',5,'Color','r')

I tried your modification. It opens 2 figures. the second one is empty.

I am trying to plot x1 with y==1 and y==0 and then x2 with y==1 and y==0.

I thought a loop would help me get it, but I can't figure it out.