Finite difference scheme used in 'CURL' function?

2020 7 7
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Which finite difference scheme does Matlab use while estimating vorticity using the CURL function?

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Sindar
Sindar 2020-7-7
编辑：Sindar 2020-7-7

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You can actually see the full code using
edit curl
it looks like everything is based on gradient, which appears to use a 2-point difference.
(In fact, all the code for gradient is there too. So, you could set up alternate FD schemes. I'd suggest copying the code into something like gradient_4point, curl_4point)

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