`R/functional_data.R`

`create_functional_data.Rd`

This function turns difference data into fitted splines in order to carry out functional data analysis. Under the hood this passes basis and order to fda::Data2fd, and fda::create.bspline.basis, and is mandatory before running run_functional_t_test. It is recommended to read the documentation for package fda for further information.

`create_functional_data(data, pupil, basis, order)`

- data
a Pupil_difference_data dataframe

- pupil
Column name indicating pupil data to fit

- basis
Integer specifying number of basis functions to create a b-spline basis

- order
Integer specifying order of b-splines (one higher than the degree)

A Pupil_difference_data dataframe fitted with b-splines.

fda package

```
Sdata <- make_pupillometryr_data(data = pupil_data,
subject = ID,
trial = Trial,
time = Time,
condition = Type)
regressed_data <- regress_data(data = Sdata, pupil1 = RPupil, pupil2 = LPupil)
mean_data <- calculate_mean_pupil_size(data = regressed_data, pupil1 = RPupil, pupil2 = LPupil)
base_data <- baseline_data(data = mean_data, pupil = mean_pupil, start = 0, stop = 100)
#> Baselining for each subject and trial. If this is not the intended behaviour you may wish to do this manually.
differences <- create_difference_data(data = base_data, pupil = mean_pupil)
#> Hard minus Easy -- relevel condition if this is not the intended outcome
spline_data <- create_functional_data(data = differences, pupil = mean_pupil, basis = 10, order = 4)
```