Extract the Euclidean coordinates for location identified by an fm_bary
object. This acts as the inverse of fm_bary().
Usage
fm_bary_loc(mesh, bary = NULL, ..., format = NULL)
# S3 method for class 'fm_mesh_2d'
fm_bary_loc(mesh, bary = NULL, ..., format = NULL)
# S3 method for class 'fm_mesh_1d'
fm_bary_loc(mesh, bary = NULL, ..., format = NULL)Arguments
- mesh
A mesh object, e.g. fm_mesh_2d or fm_mesh_1d.
- bary
An
fm_baryobject. IfNULL, return the mesh nodes is the mesh class supports it, otherwise gives an error.- ...
Further arguments potentially used by sub-methods.
- format
Optional format for the output. If
NULL, the output format is determined by the default for the mesh object.
Methods (by class)
fm_bary_loc(fm_mesh_2d): Extract points on a triangle mesh. Implemented formats are"matrix"(default) and"sf".fm_bary_loc(fm_mesh_1d): Extract points on a 1D mesh. Implemented formats are"numeric"(default).
Examples
head(fm_bary_loc(fmexample$mesh))
#> [,1] [,2] [,3]
#> [1,] -4.991262 1.4785425 0
#> [2,] -5.287832 0.6496857 0
#> [3,] -5.331027 -0.2295705 0
#> [4,] -5.088120 -1.1511736 0
#> [5,] -4.710559 -1.7810970 0
#> [6,] -4.191253 -2.3004024 0
bary <- fm_bary(fmexample$mesh, fmexample$loc_sf)
fm_bary_loc(fmexample$mesh, bary, format = "matrix")
#> [,1] [,2] [,3]
#> [1,] -1.2070657 -0.47719270 0
#> [2,] 0.2774292 -0.99838644 0
#> [3,] 1.0844412 -0.77625389 0
#> [4,] -2.3456977 0.06445882 0
#> [5,] 0.4291247 0.95949406 0
#> [6,] 0.5060559 -0.11028549 0
#> [7,] -0.5747400 -0.51100951 0
#> [8,] -0.5466319 -0.91119542 0
#> [9,] -0.5644520 -0.83717168 0
#> [10,] -0.8900378 2.41583518 0
fm_bary_loc(fmexample$mesh, bary, format = "sf")
#> Simple feature collection with 10 features and 0 fields
#> Geometry type: POINT
#> Dimension: XYZ
#> Bounding box: xmin: -2.345698 ymin: -0.9983864 xmax: 1.084441 ymax: 2.415835
#> CRS: NA
#> geometry
#> 1 POINT Z (-1.207066 -0.47719...
#> 2 POINT Z (0.2774292 -0.99838...
#> 3 POINT Z (1.084441 -0.776253...
#> 4 POINT Z (-2.345698 0.064458...
#> 5 POINT Z (0.4291247 0.959494...
#> 6 POINT Z (0.5060559 -0.11028...
#> 7 POINT Z (-0.57474 -0.511009...
#> 8 POINT Z (-0.5466319 -0.9111...
#> 9 POINT Z (-0.564452 -0.83717...
#> 10 POINT Z (-0.8900378 2.41583...
mesh1 <- fm_mesh_1d(1:4)
fm_bary_loc(mesh1)
#> [1] 1 2 3 4
(bary1 <- fm_bary(mesh1, seq(0, 5, by = 0.5)))
#> # A tibble: 11 × 2
#> index where[,1] [,2]
#> * <int> <dbl> <dbl>
#> 1 1 2 -1
#> 2 1 1.5 -0.5
#> 3 1 1 0
#> 4 1 0.5 0.5
#> 5 2 1 0
#> 6 2 0.5 0.5
#> 7 3 1 0
#> 8 3 0.5 0.5
#> 9 3 0 1
#> 10 3 -0.5 1.5
#> 11 3 -1 2
fm_bary_loc(mesh1, bary1)
#> [1] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
(bary1 <- fm_bary(mesh1, seq(0, 5, by = 0.5), restricted = TRUE))
#> # A tibble: 11 × 2
#> index where[,1] [,2]
#> * <int> <dbl> <dbl>
#> 1 1 1 0
#> 2 1 1 0
#> 3 1 1 0
#> 4 1 0.5 0.5
#> 5 2 1 0
#> 6 2 0.5 0.5
#> 7 3 1 0
#> 8 3 0.5 0.5
#> 9 3 0 1
#> 10 3 0 1
#> 11 3 0 1
fm_bary_loc(mesh1, bary1)
#> [1] 1.0 1.0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.0 4.0
fm_basis(mesh1, bary1)
#> 11 x 4 sparse Matrix of class "dgCMatrix"
#>
#> [1,] 1.0 0.0 . .
#> [2,] 1.0 0.0 . .
#> [3,] 1.0 0.0 . .
#> [4,] 0.5 0.5 . .
#> [5,] . 1.0 0.0 .
#> [6,] . 0.5 0.5 .
#> [7,] . . 1.0 0.0
#> [8,] . . 0.5 0.5
#> [9,] . . 0.0 1.0
#> [10,] . . 0.0 1.0
#> [11,] . . 0.0 1.0
(bary1 <- fm_bary(mesh1, bary1, method = "nearest"))
#> # A tibble: 11 × 2
#> index where[,1]
#> * <int> <dbl>
#> 1 1 1
#> 2 1 1
#> 3 1 1
#> 4 1 1
#> 5 2 1
#> 6 2 1
#> 7 3 1
#> 8 3 1
#> 9 4 1
#> 10 4 1
#> 11 4 1
fm_bary_loc(mesh1, bary1)
#> [1] 1 1 1 1 2 2 3 3 4 4 4
fm_basis(mesh1, bary1)
#> 11 x 4 sparse Matrix of class "dgCMatrix"
#>
#> [1,] 1 0 . .
#> [2,] 1 0 . .
#> [3,] 1 0 . .
#> [4,] 1 0 . .
#> [5,] . 1 0 .
#> [6,] . 1 0 .
#> [7,] . . 1 0
#> [8,] . . 1 0
#> [9,] . . 0 1
#> [10,] . . 0 1
#> [11,] . . 0 1
(bary1 <- fm_bary(mesh1, bary1, method = "linear"))
#> # A tibble: 11 × 2
#> index where[,1] [,2]
#> * <int> <dbl> <dbl>
#> 1 1 1 0
#> 2 1 1 0
#> 3 1 1 0
#> 4 1 1 0
#> 5 2 1 0
#> 6 2 1 0
#> 7 3 1 0
#> 8 3 1 0
#> 9 3 0 1
#> 10 3 0 1
#> 11 3 0 1
fm_bary_loc(mesh1, bary1)
#> [1] 1 1 1 1 2 2 3 3 4 4 4
fm_basis(mesh1, bary1)
#> 11 x 4 sparse Matrix of class "dgCMatrix"
#>
#> [1,] 1 0 . .
#> [2,] 1 0 . .
#> [3,] 1 0 . .
#> [4,] 1 0 . .
#> [5,] . 1 0 .
#> [6,] . 1 0 .
#> [7,] . . 1 0
#> [8,] . . 1 0
#> [9,] . . 0 1
#> [10,] . . 0 1
#> [11,] . . 0 1