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Convert other surface formats to ieegio surface

Source: R/as_ieegio_surface.R
as_ieegio_surface.Rd

Convert other surface formats to ieegio surface

Usage

as_ieegio_surface(x, ...)

# Default S3 method
as_ieegio_surface(
  x,
  vertices = x,
  faces = NULL,
  face_start = NA,
  transform = NULL,
  vertex_colors = NULL,
  annotation_labels = NULL,
  annotation_values = NULL,
  measurements = NULL,
  time_series_slice_duration = NULL,
  time_series_value = NULL,
  name = NULL,
  ...
)

# S3 method for class 'character'
as_ieegio_surface(x, ...)

# S3 method for class 'ieegio_surface'
as_ieegio_surface(x, ...)

# S3 method for class 'mesh3d'
as_ieegio_surface(x, ...)

# S3 method for class 'fs.surface'
as_ieegio_surface(x, ...)

Arguments

x

R object or file path

...

passed to default method

vertices

n by 3 matrix, each row is a vertex node position

faces

(optional) face index, either zero or one-indexed (Matlab and R start counting from 1 while C and Python start indices from 0); one-index face order is recommended

face_start

(optional) either 0 or 1, indicating whether faces is zero or one-indexed; default is NA, which will check whether the minimum value of faces is 0. If so, then faces will be bumped by 1 internally

transform

(optional) a 4 by 4 matrix indicating the vertex position to scanner RAS transform. Default is missing (identity matrix), i.e. the vertex positions are already in the scanner RAS coordinate system.

vertex_colors

(optional) integer or color (hex) vector indicating the vertex colors

annotation_labels

(optional) a data frame containing at the following columns. Though optional, annotation_labels must be provided when annotation_values is provided

"Key"

unique integers to appear in annotation_values, indicating the key of the annotation label

"Label"

a character vector (strings) of human-readable labels of the corresponding key

"Color"

hex string indicating the color of the key/label

annotation_values

(optional) an integer table where each column is a vector of annotation key (for example, 'FreeSurfer' segmentation key) and each row corresponds to a vertex node

measurements

(optional) a numeric table where each column represents a variable (for example, curvature) and each row corresponds to a vertex node. Unlike annotations, which is for discrete node values, measurements is for continuous values

time_series_slice_duration

(optional) a numeric vector indicating the duration of each slice; default is NA

time_series_value

(optional) a numeric matrix (n by m) where n is the number of vertices and m is the number of time points, hence each column is a time slice and each row is a vertex node.

name

(optional) name of the geometry

Value

An ieeg_surface object; see read_surface or 'Examples'.

Examples




# ---- Simple usage
# vertices only
dodecahedron_vert <- matrix(
  ncol = 3, byrow = TRUE,
  c(-0.62, -0.62, -0.62, 0.62, -0.62, -0.62, -0.62, 0.62, -0.62,
    0.62, 0.62, -0.62, -0.62, -0.62, 0.62, 0.62, -0.62, 0.62,
    -0.62, 0.62, 0.62, 0.62, 0.62, 0.62, 0.00, -0.38, 1.00,
    0.00, 0.38, 1.00, 0.00, -0.38, -1.00, 0.00, 0.38, -1.00,
    -0.38, 1.00, 0.00, 0.38, 1.00, 0.00, -0.38, -1.00, 0.00,
    0.38, -1.00, 0.00, 1.00, 0.00, -0.38, 1.00, 0.00, 0.38,
    -1.00, 0.00, -0.38, -1.00, 0.00, 0.38)
)

point_cloud <- as_ieegio_surface(dodecahedron_vert)
plot(point_cloud, col = "red")



# with face index
dodecahedron_face <- matrix(
  ncol = 3L, byrow = TRUE,
  c(1, 11, 2, 1, 2, 16, 1, 16, 15, 1, 15, 5, 1, 5, 20, 1, 20, 19,
    1, 19, 3, 1, 3, 12, 1, 12, 11, 2, 11, 12, 2, 12, 4, 2, 4, 17,
    2, 17, 18, 2, 18, 6, 2, 6, 16, 3, 13, 14, 3, 14, 4, 3, 4, 12,
    3, 19, 20, 3, 20, 7, 3, 7, 13, 4, 14, 8, 4, 8, 18, 4, 18, 17,
    5, 9, 10, 5, 10, 7, 5, 7, 20, 5, 15, 16, 5, 16, 6, 5, 6, 9,
    6, 18, 8, 6, 8, 10, 6, 10, 9, 7, 10, 8, 7, 8, 14, 7, 14, 13)
)
mesh <- as_ieegio_surface(dodecahedron_vert,
                          faces = dodecahedron_face)
plot(mesh)



# with vertex colors
mesh <- as_ieegio_surface(dodecahedron_vert,
                          faces = dodecahedron_face,
                          vertex_colors = sample(20))
plot(mesh, name = "color")



# with annotations
mesh <- as_ieegio_surface(
  dodecahedron_vert,
  faces = dodecahedron_face,
  annotation_labels = data.frame(
    Key = 1:3,
    Label = c("A", "B", "C"),
    Color = c("red", "green", "blue")
  ),
  annotation_values = data.frame(
    MyVariable = c(rep(1, 7), rep(2, 7), rep(3, 6))
  )
)
plot(mesh, name = "annotations")



# with measurements
mesh <- as_ieegio_surface(
  dodecahedron_vert,
  faces = dodecahedron_face,
  measurements = data.frame(
    MyVariable = dodecahedron_vert[, 1]
  )
)
plot(mesh, name = "measurements",
     col = c("blue", "gray", "red"))