MATLAB: What is the function to plot this graph

matrix arrayplot

Hi I have an array with values between 0 and 1 and wanted to draw a graph like this: http://imm.io/apWy

Thanks, Fernando

Best Answer

scalefactor = 100;  %I am guessing!
[X,Y] = ndgrid(1:size(YourArray,1), 1:size(YourArray,2));
scatter(X(:), Y(:), scalefactor*YourArray(:), YourArray(:))

You will probably want to play with the scale factor, and probably want to play with the colormap .

Related Solutions

MATLAB: Apply colormap to plot(x,y)

To create the colormap, you could use spectrumRGB in Spectral and XYZ Color Functions.

EDIT: Here is a little demo.

n = 20; 
x = rand(n,1); y = rand(n,1); spect = linspace(300,830,n);
sRGB = spectrumRGB(spect);
sRGB = squeeze(sRGB); % For some reason spectrumRGB returns a 3D array
figure; hold on
for i = 1:n
  line(x(i),y(i),'Marker','*','Linestyle','none','Color',sRGB(i,:))
end
spectrumlabel(gca)

MATLAB: How to join two set of points using scatter command

x1=1:10; y1=1:10;
new_x1 = x1;
new_y1 = y1*2;
cmap = colormap(jet(length(x1)));
figure(1);
scatter(x1,y1,[],cmap,'Marker','d');
hold on;
scatter(new_x1,new_y1,[],cmap,'Marker','*');
hold off;
for i = 1:length(x1)
line([x1(i),y1(i)],[new_x1(i),new_y1(i)],'Color',cmap(i,:));
end

Best Answer

Related Solutions

MATLAB: Apply colormap to plot(x,y)

MATLAB: How to join two set of points using scatter command

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