get_scalpmap: Calculate an interpolated scalpmap

In neuroconductor/eegUtils: Utilities for Electroencephalographic (EEG) Analysis

Calculate an interpolated scalpmap

Description

Calculate and return an interpolated scalpmap from a data.frame or eeg_epochs object. This provides the basis for a raster plot, as used to create topographical plots.

Usage

get_scalpmap(data, ...)

## S3 method for class 'data.frame'
get_scalpmap(
  data,
  method = "biharmonic",
  grid_res = 100,
  interp_limit = "skirt",
  quantity = "amplitude",
  facets = NULL,
  r = 95,
  k = -1,
  ...
)

## S3 method for class 'eeg_epochs'
get_scalpmap(
  data,
  method = "biharmonic",
  grid_res = 100,
  interp_limit = "skirt",
  quantity = "amplitude",
  facets = NULL,
  r = 95,
  ...
)

Arguments

data	An object of class 'data.frame'
...	Other arguments
method	"biharmonic" or "gam" smooth
grid_res	Grid resolution
interp_limit	Interpolate up to the "head" or add a "skirt"
quantity	Quantity to be plotted. Defaults to "amplitude".
facets	Any facets you plan to use
r	Size of headshape
k	Degrees of freedom used for spline when using method = gam. Defaults to -1, which attempts to automatically determine k.

Value

A tibble with the columns x, y, fill

Methods (by class)

• data.frame: Get scalpmap from a data.frame

• eeg_epochs: Get scalpmap from an eeg_epochs object.

Examples

head(get_scalpmap(demo_epochs))

neuroconductor/eegUtils documentation built on Feb. 3, 2023, 5:33 p.m.