sub-sub-.bucss_plan: Positional Extraction From a Bias and Uncertainty Corrected...

In BUCSS: Bias and Uncertainty Corrected Sample Size

Positional Extraction From a Bias and Uncertainty Corrected Sample Size Result

Description

Backward-compatible positional extraction for bucss_plan objects. The deprecated 1.x functions (see bucss-deprecated) returned an unnamed two-element list, list(sample_size, ncp), so code written for BUCSS 1.x reads result[[1]] and result[[2]]. The ss_buc_* functions return a richer object, but result[[1]] still yields the necessary sample size and result[[2]] the bias and uncertainty adjusted noncentrality parameter, so that 1.x extraction code keeps working.

Any other subscript (a column name, or a length other than one) falls through to the ordinary data.frame method, so result[["value"]] and result$value are unaffected.

The legacy reading applies only to an object that still has the shape of a single plan, as its planner returned it. An object that keeps the class without that shape (several plans stacked together, or a plan with rows removed, which some data manipulation tools leave in the class) is read as the plain data.frame it is, so [[1]] and [[2]] give its term and value columns rather than one plan's sample size and noncentrality parameter.

Usage

## S3 method for class 'bucss_plan'
x[[i, ...]]

Arguments

x	A bucss_plan object.
i	A subscript. A single double 1 or 2, as 1.x code writes it, selects the legacy scalar; anything else, including the integers 1L and 2L, is passed to the data.frame method as a column index.
...	Passed to the data.frame method.

Value

For i equal to the double 1 or 2 and an object with the shape of a single plan, a single numeric value; otherwise whatever the data.frame [[ method returns.

BUCSS documentation built on Oct. 14, 2026, 1:07 a.m.