Plotting a Graph with Shapes and Colours

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Tom
Tom 2020-2-17
回答： darova 2020-2-17
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')
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Tom
Tom 2020-2-17
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
Tom 2020-2-17
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?

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采纳的回答

darova
darova 2020-2-17
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')

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