Need Help in Placing nodes in graphs with given coordinates as shown in the figure

I need to plot these nodes with their given coordinates as shown in the figure.

Answer 1

[Image Analyst]

Did you try plot()? You probably did, so what was wrong with it?

xy = [2, 1;
  1,2
  2,2
  3,2
  1,3
  2,3
  3,3
  1,4
  2,4
  3,4]
x = xy(:, 1);
y = xy(:, 2);
plot(x, y, 'b^', 'LineWIdth', 3, 'MarkerSize', 30);
grid on;
axis ij; % Reverse y axis.

[Mahmoud Ahmed]

On the same figure, If I want to draw 2 links between node 2 and nodes 1 and 5 respectively.. How can I do this?

[Image Analyst]

Did you try plot() or line()?

[Mahmoud Ahmed]

Could you write the command of line that can plot line between node 2 and 5 in this figure, please?

[Image Analyst]

OK, (since you were unable to do it after reading the documentation for the last 45 minutes). I'm also putting the text labels in the center of the triangles, in case you want that.

xy = [2, 1;
  3,2
  2,2
  1,2
  3,3
  2,3
  1,3
  3,4
  2,4
  1,4]
x = xy(:, 1);
y = xy(:, 2);
plot(x, y, 'b^', 'LineWidth', 3, 'MarkerSize', 30);
grid on;
axis ij; % Reverse y axis.
line([x(2), x(5)], [y(2), y(5)], 'Color', 'r', 'LineWidth', 3);
% Show labels
for k = 1 : length(x)
  text(x(k), y(k), num2str(k), 'Color', 'b', 'FontSize', 15);
end
yticks(1:5);
xticks(1:5);

[Mahmoud Ahmed]

If I want to write RF link over the link between node 2 and 5 .. How can I do this? Thanks for your time

[Image Analyst]

Note how I used text. You can double click text() and figure out how to use it from the help, right? Once you do that, you'll see that you can use something like

text(2.86, 2.5, 'RF Link', 'Color', 'r', 'FontSize', 15);