GetNsim {ggdmc}

Get a n-cell matrix

Description

Constructs a matrix, showing how many responses to in each cell. The function checks whether the format of n and ns conform.

Usage

GetNsim(model, n, ns)

Arguments

model

a model object.

n

number of trials.

ns

number of subjects.

Details

n can be:

1. an integer for a balanced design,

2. a matrix for an unbalanced design, where rows are subjects and columns are cells. If the matrix is a row vector, all subjects have the same n in each cell. If it is a column vector, all cells have the same n. Otherwise each entry specifies the n for a particular subject x cell combination. See below for concrete examples.

Examples

model <- BuildModel(
  p.map     = list(A = "1", B = "R", t0 = "1", mean_v = "M", sd_v = "M",
                  st0 = "1"),
  match.map = list(M = list(s1 = 1, s2 = 2)),
  constants = c(sd_v.false = 1, st0 = 0),
  factors   = list(S = c("s1","s2")),
  responses = c("r1", "r2"),
  type      = "norm")

#######################30
## Example 1
#######################30
GetNsim(model, ns = 2, n = 1)
#      [,1] [,2]
# [1,]    1    1
# [2,]    1    1

#######################30
## Example 2
#######################30
n <- matrix(c(1:2), ncol = 1)
#      [,1]
# [1,]    1  ## subject 1 has 1 response for each cell
# [2,]    2  ## subject 2 has 2 responses for each cell

GetNsim(model, ns = 2, n = n)
#      [,1] [,2]
# [1,]    1    1
# [2,]    2    2

#######################30
## Example 3
#######################30
n <- matrix(c(1:2), nrow = 1)
#      [,1] [,2]
# [1,]    1    2
GetNsim(model, ns = 2, n = n)
#     [,1] [,2]
# [1,]   1    2 ## subject 1 has 1 response for cell 1 and 2 responses for cell 2
# [2,]   1    2 ## subject 2 has 1 response for cell 1 and 2 responses for cell 2

#######################30
## Example 4
#######################30
n <- matrix(c(1:4), nrow=2)
#      [,1] [,2]
# [1,]    1    3
# [2,]    2    4
ggdmc::GetNsim(model, ns = 2, n = n)
#      [,1] [,2]
# [1,]    1    3 ## subject 1 has 1 response for cell 1 and 3 responses for cell 2
# [2,]    2    4 ## subject 2 has 2 responses for cell 1 and 4 responses for cell 2