Why Matlab and Simulink have different Plot for the same modulo function?

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Chenji Tu
Chenji Tu 2021-4-1
评论： Chenji Tu 2021-4-1
Dear community,
as shown in the attached .png, it seems for the same modulo function, the plot from Matlab looks not the same as that from Simulink.
Changing the Solver Settings doesn't make a difference.
Why?

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2021-4-1
The step size is more important than solver in this case. Reducing the step size to be 1 or 0.5 and making it fixed would resolve the problem.
  2 个评论
Steven Lord
Steven Lord 2021-4-1
Ran in:
That's my thought as well. Sometimes the step size is critical in showing what a function truly looks like.
x = 0:10;
plot(x, sinpi(x), 'o-')
Look what happens if we evaluate the function at a few more points.
figure
x2 = 0:0.25:10;
plot(x2, sinpi(x2), 'o-')
Looks a lot more like a sine curve, doesn't it?

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