MATLAB: How to delete the plotted particular coordinate from 2d graph

delete

 N=20;
area=100;
X=rand(1,N)*area;
Y=rand(1,N)*area;
XX=area/2;
YY=area/2;
plot(XX,YY,':o','LineWidth',3,'MarkerEdgeColor','k',...
'MarkerFaceColor','w','MarkerSize',20);
for i=1:N
   plot(X(i),Y(i),'--o',...
   'MarkerSize',10,'Color','b',...
   'MarkerEdgeColor','b','MarkerFaceColor','b');
   text(X(i),Y(i),num2str(i),'fontsize',15);
   line([XX,X(i)],[YY,Y(i)])
   hold on
end
>> XY=[X;Y]'
now i wish to delete the 10 no node delete from 2d gaph and delete the line and plotted marker from the node 10th

Best Answer

I am not certain what you want to do, but if I understand correctly, I would set the 10th value to NaN.
Either:
X(10) = NaN;
Y(10) = NaN;
or:
XY=[X;Y]'
XY(10,:) = NaN;
depending on where in your code you want to do it. If you do not want the 10th node to be plotted, set the values to NaN before the plotting loop. The advantage of setting them to NaN is that it preserves the length of both vectors and of your ‘XY’ matrix, if that is important in your code.
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