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Tobit model on unbalanced panel

3 messages · Terry Therneau, amit jain, Arne Henningsen

Original
Terry Therneau
# 
For tobit regression, also see the last example of help(survreg) in the
survival package.

Terry Therneau
amit jain
# 
Dear All,

I have been trying to connect to haver to download data and have made some good progress.
I am stuck at a point and would appreciate your help.

Haver provides a dll called DLXAPI32 using which i can connect to excel/vb/c etc.

Now i tried calling it from R and used following code:
 
options(warn.FPU = TRUE)
dyn.load("DLL/dlxapi32.dll")

Warning message:
In inDL(x, as.logical(local), as.logical(now), ...) :
  DLL attempted to change FPU control word from 8001f to 9001f
 --- gives a warning that dll attempted to change hex code
Since its just a warning, I ignored it, since my code options(warn.FPU = TRUE) will let me know if the hex code is actually changed



is.loaded("DLXOpenDatabase")  
[1] TRUE

# is.loaded is a function to check if "DLXOpenDatabase" symbol is loaded. As the output shows this symbol gets loaded and is ready to be used
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE


Above code lines show that the function DLXOpenDatabase is available to be used.

Now, when i use the following call the R crashes

.C("DLXOpenDatabase","W:/DLX/USECON")

"W:/DLX/USECON" is parameter for the function DLXOpenDatabase which is successfully used in VB call
Normally this call should give me an output "0" which shows the connection is successfully established, but the R crashes.


My question is "Is this because Haver DLL malfunctioned" or is this because i am doing something wrong.

http://127.0.0.1:29087/library/base/html/dynload.html is the link to help i used

Thanks in advance for your help.

Amit
Arne Henningsen
# 
Hi Terry
On 24 November 2010 15:34, Terry Therneau <therneau at mayo.edu> wrote:
How does the survreg() function of the "survival" package account for
the panel structure of the data?

Best wishes,
Arne