Description
This Function creates a GUI where user can choose one of four Tasks to
perform computations related to group sequential boundaries using the spending functions.
There are the following four options which compute:
-1- bounds given analysis times and a spending function;
-2- drift parameters corresponding to given power and bounds;
-3- probabilities given times, bounds and drift parameters;
-4- a confidence interval given times, bounds and final test statistic value.Details
The GUI is build within the Tcl/Tk interface of R. I attended to only use the standard Tcl/Tk package,
to keep as much compatibility as possible. So you won�t have to install additional Tcl/Tk packages
which might cause problems sometimes. Moreover the GUI should work on all platforms.
Each task and calculation will open in a new window with possibilty to save results into a *.html File.
So you are able to multitask and to compare results directly and decide which of them you want to save.