I want to create a plot using X Y coordinates

I have 51 nodes that each one of them has X Y coordinates. I used the command: plot(x,y, 'd') but I would like the figure to show me the number of each node next to the diamond.For example the first node I'd like to have the number 1 next to it, the second the number 2 etc. Also I'd like the first node to be different shape or colour from the others. Do I have to use two different types of plot or it can be done in the same command? Thank you for your time.

Answer 1

[Star Strider]

Use the text function.

Example: —

x = rand(1,5);
y = rand(1,5);
nrc = compose('%2d',1:numel(x));                % Coordinate Numbers (Cell Array)
cm = jet(numel(x));                             % Use The ‘colormap’ Of Your Choice

figure
scatter(x, y, 75, cm, 'd', 'filled')
grid
text(x, y, nrc)

EDIT — (2 Jan 2021 at 19:18)

Changed from plot to scatter since it provides more options, especially with respect to colouring the points. There are a limited number of shapes, so I would just go with changing the colours. The sizes of the plotted points can chnage with the colours with scatter.

[George Sfinarolakis]

Thank you very much for your time! It worked

[Star Strider]

As always, my pleasure!

Answer 2

[Walter Roberson]

 plot(x, y)
 text(x, y, string(1:numel(x)))

Now scatter(x(:), y(:), Pointsize, C)

where C is a numel(x) by 3 color array in which you set the first row to be different from the others. You can also set the marker shape on the call.

Limitations:

• all of the markers for the same plot line must be the same color and shape (unless I am forgetting a recent change)
• all of the markers for a single scatter call must be the same shape

Answer 3

[Matt J]

x=rand(10,1); y=rand(10,1);
n=numel(x);
plot(  graph(1:n,1:n),'LineStyle','none','Marker','d','XData',x,'YData',y); 

[George Sfinarolakis]

That's also perfect. Thank you!

[Maheedhar Korimi]

Hi Matt, can I get 95 percentile in this data? maybe a circle representing 95 percentile of this data?

for example, consider 100 nodes, which is represented by (x,y) coordinates. How can I locate 95 percentile of this data?