what is the equation matlab uses to calculate slope in the gradient function

4 vues (au cours des 30 derniers jours)
Stuart
Stuart le 31 Juil 2014
Réponse apportée : Gilbert@12345 le 2 Août 2017
When using the command: [ASPECT, SLOPE, gradN, gradE] = gradientm(Z, R)
what is the equation that MATLAB uses to calculate the SLOPE?
If one uses the HELP for the gradient command, the help shows the definition (equations) of the calculation that is performed. This would be helpful for gradientm as well.
The HELP for the gradientm command does not provide this info.
  1 commentaire
Eric
Eric le 31 Juil 2014
Due to the nature of the problem, I think the reason there's no simple equation for gradientm is that no simple equation exists. Your best bet may be to look at the code within gradientm.m.
-Eric

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Gilbert@12345
Gilbert@12345 le 2 Août 2017
Please read page 287 of Matlab recipes for Earth Sciences
https://books.google.fr/books?id=-8q5BgAAQBAJ&pg=PA287&lpg=PA287&dq=matlab+gradientm&source=bl&ots=-EUpZv2jv6&sig=CnW5MRIAlNh6XlFsLUscMipvXBM&hl=fr&sa=X&ved=0ahUKEwioy8-rgrjVAhVCxRQKHaC5AygQ6AEIQjAD#v=onepage&q=matlab%20gradientm&f=false

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