Return a javascript function that samples from an array
fn_sample(x, size, replace = FALSE, weights = NULL)
| x | A vector specifying the possible values |
|---|---|
| size | The number of values to sample |
| replace | Sample with replacement? (default = FALSE) |
| weights | Probability of sampling each item (ignored if replace = FALSE) |
Returns a javascript function that samples from an array of values
The fn_sample() is used to return a function that, when called
from within a jsPsych experiment, will mirror the behaviour of the sample()
function from the base package using th jsPsych randomisation functions to
at runtime. The input argument x specifies the set of values from which
samples should be drawn, and the size argument specifies the number of
samples to be drawn. When replace = TRUE items are sampled with
replacement, and when replace = FALSE items are sampled without
replacement. When sampling with replacement, the weights argument can
be used to specify unequal sampling probabilities.
The current implementation is limited. It does not work when x is a
character vector, for example. Note also that the value returned within
the jsPsych experiment is always an array (not a scalar), even when
size = 1.