How to set period (t=0 becomes t=-4)

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NS 2016-4-15

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https://ww2.mathworks.cn/matlabcentral/answers/279184-how-to-set-period-t-0-becomes-t-4

评论： NS 2016-4-18

I'm creating graphs in Matlab for a relative simple equation. I want the value that is the first value in my input matrix to be 'recognized' as belonging to t=-4 and not t=0. Or put differently, I want to 'move' my graph a little to the left relative to the x axis. How do I go about this?

Thank you in advance!

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Answer 1

J. Webster 2016-4-15

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https://ww2.mathworks.cn/matlabcentral/answers/279184-how-to-set-period-t-0-becomes-t-4#answer_218034

在 MATLAB Online 中打开

might depend on what and how you're plotting. For the simplest case you can just do this...

t = 0:100;
data = somefunction(t);
plot(t-4, data);

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NS 2016-4-18

test1658.m

Thank you! I've attached my .m file for reference, without the additional time commands yet. I'm trying to plot the pi function.

When I use your suggested code, I get an error for the 'plot(t-4, data)' command, saying vectors must be the same length. What would be causing the issue?

Thank you in advance!

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