Plot a single-arm two-stage ROPE design — plot.singlearm_rope_twostage

Produces a six-panel figure in a 2-row by 3-column layout:

Top-left: Predictive type-I error and power as functions of the stage-1 sample size \(n_1\) for the fixed maximum \(n^*\), with the optimal \(n_1\) marked. Optional dashed frequentist curves are added when corresponding calibration targets are present.
Top-centre: Predictive PCE under \(H_0\) as a function of \(n_1\) for the fixed maximum \(n^*\), with the optimal \(n_1\) marked.
Top-right: Compact textual summary of the optimal design and its operating characteristics.
Bottom-left: Null design prior density with the direction-appropriate ROPE region shaded.
Bottom-centre: Alternative design prior density with the direction-appropriate ROPE region shaded.
Bottom-right: Analysis prior density with the direction-appropriate ROPE region shaded.

Usage

# S3 method for class 'singlearm_rope_twostage_design'
plot(x, type = c("default", "interim", "final"), ...)

x: An object of class "singlearm_rope_twostage_design".
type: Character string selecting the plot type. One of "default" (default), "interim", or "final".
...: Further graphical parameters passed to par() for the "interim" and "final" types.

Invisibly returns x.

Additional plot types are available via the type argument:

"default": The 2x3 summary layout described above (default).
"interim": Interim posterior probability vs. stage-1 responses, showing the continuation region \(C_1\).
"final": Final posterior probability vs. total responses, showing the acceptance region.