[R] Having trouble with running ldBands in Hmisc package. Posted in StackExchange

Marc Schwartz marc_schwartz at me.com
Mon Oct 10 19:10:58 CEST 2016

> On Oct 10, 2016, at 11:39 AM, David Winsemius <dwinsemius at comcast.net> wrote:
>> On Oct 10, 2016, at 7:03 AM, Pitch Mandava via R-help <r-help at r-project.org> wrote:
>> I am trying to run the example from Hmisc package in RStudio environment under Windows 10 and downloaded ld98.exe> .libPaths()Produces the following output[1] "C:/Users/username/X1_Carbon/Documents/R/win-library/3.2"[2] "C:/Program Files/R/R-3.2.5/library"I moved the ld98.exe to C:/Users/username/X1_Carbon/Documents/R/win-library/3.2Then installed Hmisc and ran the following> require(Hmisc)
>>> b <- ldBands(5, pr=FALSE)Produces the followingError: could not find function "ldBands"To see if ld98.exe is working in the directory I ran the ld98.exe in the Windows environment I get the following outputProgram for computations related to group sequential boundaries using spending functions.Is this an interactive session? (1=yes,0=no)yes interactive = 1etc.....
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> You should check the NEWS file. That function was removed in Hmisc version 3.14
> -- 
> David,


Just to augment David's reply with some additional direction, if you specifically need the Lan-DeMets methodology.

The Clinical Trials Task View:

  https://cran.r-project.org/web/views/ClinicalTrials.html <https://cran.r-project.org/web/views/ClinicalTrials.html>

provides names of other packages that provide for group sequential boundary calculations, although it looks like the entry for Hmisc needs to be edited there. I am cc'ing the CT TV maintainer here as a heads up.


Marc Schwartz

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