Plot Method for sim.data Objects — plot.sim.data • Qval

This function generates a bar plot visualizing the distribution of \(\boldsymbol{\alpha}\). The plot includes both the frequency and proportion (percentage) of each pattern. Frequencies are displayed as bars, and proportions are annotated both above the bars and as a secondary axis on the right.

# S3 method for class 'sim.data'
plot(x, ...)

Arguments

x: An object of class sim.data, typically returned by sim.data function.
...: Additional arguments (currently unused).

Value

None. This function is used for side effects (plotting).

Examples

set.seed(123)
library(Qval)

Q <- sim.Q(3, 20)
IQ <- list(
  P0 = runif(20, 0.0, 0.2),
  P1 = runif(20, 0.8, 1.0)
)
data.obj <- sim.data(Q = Q, N = 500, IQ = IQ,
                     model = "GDINA", distribute = "horder")
#> distribute =  horder 
#>  model =  GDINA 
#>  number of attributes:  3 
#>  number of items:  20 
#>  num of examinees:  500 
#>  average of P0 =  0.083 
#>  average of P1 =  0.894 
#> theta_mean =  -0.055 , theta_sd = 0.996 
#>  a =  1.5 1.5 1.5 
#>  b =  -1.5 1.5 0 
plot(data.obj)