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Is interpolation faster in Simulink or Matlab?

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Marcus Jansson 2017-5-2

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https://ww2.mathworks.cn/matlabcentral/answers/338319-is-interpolation-faster-in-simulink-or-matlab

回答： Jan 2017-6-20

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I have a Simulink program that is compiled. The Simulink program contains a Matlab function where the physics are modelled. For each timestep an interpolation will take place, a length is interpolated to an angle. I have the opportunity to choose whether to implement the interpolation in Simulink or within the Matlab function. What is the best?

I know 'interp1' is slow and that there are faster functions like 'interp1q' or 'interp1qr' in Matlab but that have greater demands for the input.

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Marcus Jansson 2017-6-19

Linear. I can use interp1q, but I wonder if Simulink is even faster with its interpolation features?

Walter Roberson 2017-6-19

For equally spaced x, see https://www.mathworks.com/matlabcentral/fileexchange/10286-fast-interpolation

For non-equally spaced x, see https://www.mathworks.com/matlabcentral/fileexchange/8627-fast-linear-interpolation

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Jan 2017-6-20

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You can use the compiled Mex version FEX: ScaleTime.

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