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scatter function for plotting points with different colors

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txt1=[{'X1'};{'A100'};{'B100'};{'C100'};{'X2'}];
y=[100;150;200;135;140];
x=[200;250;300;225;235];
figure(1),scatter(y, x, 'b^');grid off;
text(y, x, txt1);
title('points')
xlabel('Y');
ylabel('X');
line(y,x,'Color','k','LineWidth',1);
%I need to make X1 and X2 red while the other points are black. If
txt1=[{'A100'};{'B100'};{'C100'};{'X1'};{'X2'}];
%I applied below codes to make red X1 and X2
figure(1),scatter(y, x, 36, [zeros(numel(y)-2,3);1 0 0;1 0 0], '^');grid off;
text(y, x, txt1);
title('points')
xlabel('Y');
ylabel('X');
line(y,x,'Color','k','LineWidth',1);
%How can I implement the last codes for the first situation?
  4 Comments
Michael Haderlein
Michael Haderlein on 19 Feb 2015
In this case
[zeros(numel(y)-2,3);1 0 0;1 0 0]
becomes
[1 0 0;zeros(numel(y)-2,3);1 0 0]
If you want to modify code you don't understand, it's better to ask for details in the respective thread instead of starting off with new questions which are almost identical.
sermet
sermet on 19 Feb 2015
alright, thank you for your response. I just couldn't reply in previous thread because significant time has passed thus I thought you wouldn't see my response.

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