View source: R/gradientInterpolation.R
covGradAtLocs | R Documentation |
Gradient of covariate field
covGradAtLocs(locs, cov_list = NULL, grad_fun = NULL)
locs |
Matrix of locations where the gradient should be evaluated |
cov_list |
List of J (number of covariates) "raster like" elements. A raster like element is a 3 elements list with named elements 1) "x" a vector of increasing x locations (at which the covariate is sampled) 2) "y" a vector of increasing y locations (at which the covariate is sampled) 3) "z" a size(x)*size(y) matrix giving covariate values at location (x, y) |
grad_fun |
Optional list of functions taking a 2d vector and returning a two 2d vector for the gradient |
Three-dimensional array of gradients of covariate fields. The rows index time, the columns are the dimensions (x and y), and the layers index the covariates.
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