Print Methods
* Created print.ldBounds: almost identical to summary
(just leaves off the exit probabilities)
* Created print.ldPower: almost identical to summary
(just leaves off the exit probs, and puts the
lower/upper probs up with the boundaries, instead
of separating)
* Edited summary.ldPower: to give power when drift is
known (put space before probs table)
Better two-sided bounds and defaults rather than weird parameters
* Created sides argument for ldBounds
* Added ability to specify the number of looks, which
then automatically creates equally spaced analysis
times
* Sides=2, but with only one alpha, etc, creates
symmetric bounds, splitting the provided alpha in
half for each, upper and lower bounds
* Print and summary functions updated to account for
this
ldPower to use output from ldBounds
* ldPower can now accept an ldBounds object as the first
argument, in which case, it does not require za,
zb, t, t2
* Defaults to drift=0 when nothing is specified
Nominal alpha level at each look provided (for one-sided or symmetric bounds)
* ldBounds now has additional value: nominal alpha at
each look.
* Summary.ldBounds displays this
asf changed from asf/alpha to asf
* asf now uses just asf rather than asf alpha (this
was only a change to alphas function)
Weird integer errors
* ldBounds and alphas now have checks that take into
account floats
Ability to specify non-alpha spending boundaries
* Created new function commonbounds to calculate
Pocock or O{'}Brien-Fleming (non-alpha-spending)
bounds at equally spaced times.
* These also become ldBounds objects
* Adjusted print and summary functions to accommodate
Calculate adjusted p-values
* Added p-value functionality to ldPower function;
stepwise and likelihood ratio ordering available.
* Uses a new adj.p function which, ironically, calls
ldPower.
* Edited printing and summary functions to use this
as well.
Graphics
* Now uses base graphics, very simple
* Option to show on either z-value or b-value scale
* Ability to add to existing plot
Conditional power
* Added condpower, a function to calculate simple
conditional power