Decimal indexing for arrays in MATLAB
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Yuvarajendra Anjaneya Reddy
le 10 Jan 2023
Commenté : Yuvarajendra Anjaneya Reddy
le 10 Jan 2023
If I have a array of 11 elements, within the range 1 and 2, with a difference of 0.1, i.e, m = 1:0.1:2; to access the value of '1.4000' from the array 'm', the normal procedure is to write 'm(5)'. (index must be an integer)
Can I somehow index 'm(1.4)' and get the value 1.4000? (have a decimal value in the index)
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Bjorn Gustavsson
le 10 Jan 2023
Sometimes I see 1-D interpolation that way - this require the array to have some simple interpretation of samples of a sufficiently smooth function that the samples in the array can be used to build useful estimates for your "fractional" indices. But indexing is to elements you have.
Yuvarajendra Anjaneya Reddy
le 10 Jan 2023
Modifié(e) : Yuvarajendra Anjaneya Reddy
le 10 Jan 2023
Réponse acceptée
Bjorn Gustavsson
le 10 Jan 2023
Have a look at the help and documentation for griddedInterpolant. That function might be what you're looking for. It creates a function that interpolates over a gridded data. For repeated calls this means that it has kept the structure for interpolation such that you won't redo all the set-up you'd do with repeated calls to interp2 again and again with repeated calls.
HTH
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