How to draw a line using drawnow command?

Question

Karupothula Prashanth 2013-5-20

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https://ww2.mathworks.cn/matlabcentral/answers/76359-how-to-draw-a-line-using-drawnow-command

Here is the code I have computed y and I need to plot it with respect to x. for r=2:length(x); plot(x(r-1),y(r-1),'--') plot(x(r),y(r),'--'); hold on drawnow; end butthie is giving me dotted line instead of a dashed line

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Answer 1

Iain 2013-5-20

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https://ww2.mathworks.cn/matlabcentral/answers/76359-how-to-draw-a-line-using-drawnow-command#answer_86019

You should change your plot command to:

plot(x,y,'.-')

If you want it to centre start at (0,0), you can instead have:

plot(x-x(1),y-y(1), '.-')

Change the '.-' as suited for your desired plot style.

drawnow only tells matlab to actually draw the graph, which is important if you want to see the chart being generated while matlab can keep executing other code