MATLAB: Scatterplot

Communications Toolboxhandle graphicsscatterplot

is there any way to get the (x,y) coordinates of a scatterplot.

Best Answer

You have to dig down a couple of layers to find the data:

h = scatterplot(rand(20,2));
h = get(h,'Children');
h = get(h,'Children');
x = get(h,'xdata');
y = get(h,'ydata');

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Try this

h1 = open('graphcvst1.fig');
h2 = open('graphcvst2.fig');
    % extract data from the first figure
figure(h1)
h = get(gca,'children');
X = get(h,'XData');
Y = get(h,'YData');
    % plot extracted data into the second figure
figure(h2)
hold on
plot(X,Y,'r')
hold off

MATLAB: Getting the data point from two plotted curves in one figure

h  = findobj(gca, 'Type', 'line');
x1 = get(h(1), 'XData')
y1 = get(h(1), 'YData')
x2 = get(h(2), 'XData')
y2 = get(h(2), 'YData')

But actually your code should work already. If h contains 2 line handles (does it?), then

h = findobj(gca, 'Type', 'line');
x = get(h, 'XData')

replies a {2 x 1} cell. Now x{1} contains the XData of the first line, x{2} of the 2nd line - and the same for the YData. Therefore I cannot reconsider why you state, that you "get the data points of imag(neff)" only. Why do you think that this is the fact?

[EDITED] Ah, this is not one axes object, but two created by plotyy or yyaxis. Then you do not need gca only, but all line objects:

h = findobj(gcf, 'Type', 'line')

You have to search in the current figure, not in the active axes only. Then your code will work.

By the way: Did you use the debugger to check, what your "h = findobj(gca,'Type','line')" replies?

Best Answer

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MATLAB: Concentration with respect to time at different temperature

MATLAB: Getting the data point from two plotted curves in one figure

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