How to plot different graphs with different colours in gui axes???

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William
William 2013-3-16
Hi everyone, I have a urgent minor problems as describe below... hope to hear some respond soon... :)
I have a problem in trying to plot different colours in the same axes in the GUI.
Let's say whenever i clicked on the button (plot) with different variables in some equations x and y, and the function of the plot button is simply to plot the graph x-y (a str line graph).
however i have add on to the last line of the plot button function with "hold on;" so that when ever i change the variables in gui, and reclick the button "plot", i will see additional lines shown in the axes...
But I would like to make it more interesting by changing the colours whenever a new plot is plotted... How am I going to go about doing it?
Best Regards Will*

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-3-16
编辑：Azzi Abdelmalek 2013-3-16
Use hold all instead of hold on

更多回答（1 个）

Image Analyst
Image Analyst 2013-3-16
Try this in the callback of the button that is supposed to update your plot.
hold on; % Prevent old plots from being blown away.
% Generate some random color.
randomColor = rand(1, 3);
% Now construct your new data newXData, newYData somehow.
% I don't know how you do that, but you do.
% Then add the new data onto the plot with the existing curves.
plot(newXData, newYData, 'Color', randomColor);

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