last_file_method: Get last file estimation method
Description
Get last file estimation method
Usage
last_file_method(xpdb, ext, .problem, .subprob)
Arguments
xpdb
An xpose database object.
ext
The file extension to be used.
.problem
The $problem number to be used.
.subprob
The subproblem number to be used.
Value
The number of the last file method as character
for the given `.problem` and file `ext`.