matlab-figure

I wish to insert a legend that is not related to the graph whatsoever: figure; hold on; plot(0,0,'or'); plot(0,0,'ob'); plot(0,0,'ok'); leg = legend('red','blue','black'); Now I wish to add it to another figure: figure; t=linspace(0,10,100); plot(t,sin(t)); %% ADD THE LEGEND OF PLOT ABOVE This is how I have solved this problem in the past: figure t=linspace(0,10,100); plot(t,sin(t)); hold on; h = zeros(3, 1); h(1) = plot(NaN,NaN,'or'); h(2) = plot(NaN,NaN,'ob'); h(3) = plot(NaN,NaN,'ok'); legend(h, 'red','blue','black'); This will plot the additional points, but because the coordinates are at

Is there a way to remove only the axis lines in the Matlab figure, without affecting ticks and tick labels. I know that box toggles the upper and right axes lines and ticks and that works perfectly for me. But my problem is that I want eliminate the bottom and left lines (only lines!) but keeping the ticks and tick labels. Any tricks? There is another undocumented way (applicable to MATLAB R2014b and later versions) of removing the lines by changing the 'LineStyle' of rulers to 'none' . Example: figure; plot(1:4,'o-'); %Plotting some data pause(0.1); %Just to make sure that the plot is made

I want to change Font Size for xlabel , ylabel , axis size, legend font size a.k.a everything at once, is this possible? By default, font is Helvetica 10. Is there way to change this? I want to use 'FontSize',14, for x or y labels. Jonas's answer is good, but I had to modify it slightly to get every piece of text on the screen to change: set(gca,'FontSize',30,'fontWeight','bold') set(findall(gcf,'type','text'),'FontSize',30,'fontWeight','bold') If you want to change font size for all the text in a figure, you can use findall to find all text handles, after which it's easy: figureHandle = gcf;

I need to plot a 3D figure with each data point colored with the value of a 4th variable using a colormap. Lets say I have 4 variables X,Y,Z and W where W = f(X,Y,Z). I want a 3D plot with X, Y, and Z as the three axis. The statement scatter3(X,Y,Z,'filled','b') gives me a scatter plot in 3D but I want to incorporate the value of Z in the graph by representing the points as an extra parameter (either with different areas :bigger circles for data points with high value of Z and small circles for data points with low value of Z or by plotting the data points with different colors using a

I would like to plot a sine curve in Matlab. But I want it blue for the positive values and red for the negative values. The following code just makes everything red... x = []; y = []; for i = -180 : 180 x = [x i]; y = [y sin(i*pi/180)]; end p = plot(x, y) set(p, 'Color', 'red') Plot 2 lines with different colours, and NaN values at the positive/negative regions % Let's vectorise your code for efficiency too! x = -pi:0.01:pi; % Linearly spaced x between -pi and pi y = sin(x); % Compute sine of x bneg = y<0; % Logical array of negative y y_pos = y; y_pos(bneg) = NaN; % Array of only positive y