Elements

Create a subset of a <code>cpd.PwrGSD</code> object

data

Tools for the evaluation of interim analysis plans for sequentially
monitored trials on a survival endpoint; tools to construct efficacy and
futility boundaries, for deriving power of a sequential design at a specified
alternative, template for evaluating the performance of candidate plans at a
set of time varying alternatives. See Izmirlian, G. (2014) <doi:10.4310/SII.2014.v7.n1.a4>.

Grant Izmirlian

PwrGSD

Power in a Group Sequential Design

Elements function

<dl> <dt>object</dt>
<dd>an object of class <code>cpd.PwrGSD</code></dd> <dt>subset</dt>
<dd>you may extract a subset via a logical expression in the
 variables of the index dataframe, <code>descr</code></dd> <dt>na.action</dt>
<dd>a method for handling <code>NA</code> values in the
 variables in the subset expression.</dd></dl>

Arguments

Grant Izmirlian &lt;izmirlian@nih.gov&gt;

Author

Create a subset of a "cpd.PwrGSD" object — Elements

<dl>

 <dt>object</dt>
<dd>an object of class <code>cpd.PwrGSD</code></dd>

 <dt>subset</dt>
<dd>you may extract a subset via a logical expression in the
 variables of the index dataframe, <code>descr</code></dd>

 <dt>na.action</dt>
<dd>a method for handling <code>NA</code> values in the
 variables in the subset expression.</dd>

</dl>

Elements: Create a subset of a "cpd.PwrGSD" object

Description

Usage

Value

Arguments

Author

See Also

Examples