grad_terra: Gradient of terra raster using bilinear interpolation
In TheoMichelot/utilTM: My Utility Functions
View source: R/raster_gradient.R
grad_terra R Documentation
Gradient of terra raster using bilinear interpolation
Description
Gradient of terra raster using bilinear interpolation
Usage
grad_terra(rast = NULL, pts, xgrid = NULL, ygrid = NULL, zmat = NULL)
Arguments
rast
SpatRast object
pts
Matrix with two columns (one for each coordinate)
xgrid
Grid of x values (if rast not provided)
ygrid
Grid of y values (if rast not provided)
zmat
Matrix of raster values (if rast not provided)
Details
The gradient has a closed form solution if bilinear interpolation
is used, as described in Appendix C of Michelot (2019, PhD thesis).
https://etheses.whiterose.ac.uk/23688/
Value
Matrix with same dimensions as pts, where the first column
gives the gradient along the first dimension, and the second column
along the second dimension.
TheoMichelot/utilTM documentation built on April 14, 2025, 12:52 p.m.
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View source: R/raster_gradient.R
| grad_terra | R Documentation |
Gradient of terra raster using bilinear interpolation
Description
Gradient of terra raster using bilinear interpolation
Usage
grad_terra(rast = NULL, pts, xgrid = NULL, ygrid = NULL, zmat = NULL)
Arguments
rast |
SpatRast object |
pts |
Matrix with two columns (one for each coordinate) |
xgrid |
Grid of x values (if rast not provided) |
ygrid |
Grid of y values (if rast not provided) |
zmat |
Matrix of raster values (if rast not provided) |
Details
The gradient has a closed form solution if bilinear interpolation is used, as described in Appendix C of Michelot (2019, PhD thesis). https://etheses.whiterose.ac.uk/23688/
Value
Matrix with same dimensions as pts, where the first column gives the gradient along the first dimension, and the second column along the second dimension.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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