Ploting known points and their values
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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!
回答（2 个）
madhan ravi
2019-1-2
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
Walter Roberson
2019-1-2
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 '-'
2 个评论
Michael Student
2019-1-2
Walter Roberson
2019-1-2
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
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