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>.

Power in a Group Sequential Design

package-ubuntu-20.04-r-4.0.5#cran#PwrGSD-2.3.3

<p>A binary operator shortcut for paste(x,y)</p>

<table summary="R argblock">
<tr valign="top">
<td><code>x</code></td>
<td>
<p>a character string</p>
</td>
</tr>
<tr valign="top">
<td><code>y</code></td>
<td>
<p>a character string</p>
</td>
</tr>
</table>

<p>Grant Izmirlian <a href="mailto:izmirlian@nih.gov">izmirlian@nih.gov</a></p>

package-ubuntu-20.04-r-4.0.5#cran#PwrGSD-2.3.3#docs#Ch1D-pste

Ch1D-pste

Description

Usage

Arguments

Value

Author(s)

Examples

PwrGSD

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`x`	a character string
`y`	a character string