scatter function for plotting points with different colors

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?

[Michael Haderlein]

Looks like this is still part of your old question http://de.mathworks.com/matlabcentral/answers/179209-scatter-function-for-different-colors

However, I have no idea what's the question now? What do you need to implement? Just define txt1, y, and x and run the code I submitted before.

[sermet]

In my previous question, txt1 was=[{'A100'};{'B100'};{'C100'};{'X1'};{'X2'}]; now txt1 is =[{'X1'};{'A100'};{'B100'};{'C100'};{'X2'}]; thus the codes you sent me make C100 and X2 red but I need X1 and X2 to be red.

[Michael Haderlein]

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]

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.