Ploting known points and their values

Hello everyone,

I have a matrix full of x1,x2,x3 (cordinates) and y (lables) for each cordinate.

For example y can contain 1 or 2, for '1' values i want to plot 'o' sign and for '2' values i want to plot a 'x' .

Is there a way to do it with a simple plot?

Thank you.

edit:

for example :

x1=[4,6,7,2], x2=[3,6,7,2], x3=[5,2,1,6], y=[1,1,2,2],

that mean thats at the cordiantes 4,3,5 i would see an o and for 7,7,1 i'd see an 'x'.

Thanks again!

[madhan ravi]

upload your data

[Michael Student]

for example

x1=[4,6,7,2], x2=[3,6,7,2], x3=[5,2,1,6], y=[1,1,2,2]

Answer 1

[madhan ravi]

x1=[4,6,7,2], x2=[3,6,7,2], x3=[5,2,1,6], y=[1,1,2,2]
X=[x1;x2;x3];
for i = 1:numel(y)
    if y(i)==1
        figure
    plot(X,'+')
    elseif y(i)==2
        figure
     plot(X,'-')
    end
end

Answer 2

[Walter Roberson]

The provided tool for this kind of plot is gscatter() . However gscatter does not handle - as a marker.

You should

mask = y==1;
text(x1(mask), x2(mask), x3(mask), '+');

and likewise with y==2 and text '-'

[Michael Student]

Hey! And thanks!

But what if i waned to use the gscatter? for example 1- 'x' and 2 - 'o' on the graph.

[Walter Roberson]

I am left a bit uncertain as to whether your (x1,x2,x3) are together providing X, Y, Z coordinates, or whether you just happen to be doing three separate vectors x1, x2, x3, and for each of them the x coordinate should be 1:length(X) with the y coordinate being X ?

if you are indeed using (X,Y,Z) triples as the points, then I suggest using gscatter3 from https://www.mathworks.com/matlabcentral/fileexchange/61502-gscatter3 -- though I am not convinced that their gscatter3b (for use with statistics toolbox) handles z correctly