Plotting a Graph with Shapes and Colours

I am plotting some results from experiments: I essentially need to plot markers of several different shapes on a figure and then have come of them in one colour and others in another colour.

I currently have the following, so I need to be able to plot a point on either figure with a shape and colour and then have a legend which specifies the meaning of each shape, plus the meaning of the colour.

figure
grid
%xlabel('R')
box on   
% lgdc = sprintfc('K_n = %3.1f', Knv);
legend('Location','SE')
fsz = 10;      % Fontsize
  % alw = 1.5;   % LineWidth
   msz =10;    
     xlabel('Kn / (\surd(\pi/2) \mu \surdRT) / Lp')
     ylabel('We /  \rho U^2 L / \sigma')
      set(gca, 'FontSize',fsz);
 saveas(gcf,'KnudsenvsWeber','jpeg')  
  
 figure
 grid
%xlabel('R')
box on   
% lgdc = sprintfc('K_n = %3.1f', Knv);
legend('Location','SE')
fsz = 10;      % Fontsize
  % alw = 1.5;   % LineWidth
   msz =10;    
     xlabel('Gas density / kg m^{-3}')
     ylabel('Entry speed / m s^{-1}')
      set(gca, 'FontSize',fsz);
 saveas(gcf,'Densityvsentryspeed','jpeg')  

[darova]

You can plot a points using plot() function

[Tom]

This is useful actually as I only need a few points, what would be the best way of adding the legend which specifies the value of the shapes and colours separately?

[Tom]

Also this plot() functions only seems to allow me to plot one point on the graph, how do I plot multiple points where I wish on the same figure?

Answer 1

[darova]

An example

h1 = plot(1,1,'.r');            % red point
hold on
h2 = plot(2,2,'.b');            % blue point
hold off
legend([h1 h2],'red point','blue point')