[R] Semi continous variable- define bounds using lpsolve

[Hans W. Borchers]

I played around a bit with the original 'lp-solve' program --- i.e., not the
R package but the program to be downloaded from Sourceforge ---, at least
version 5.5.0.15 through its IDE.  I was not even able to reproduce the
example on semi-continuous variables in the reference documentation at
<http://lpsolve.sourceforge.net/5.5/>.

It appears as if a bug has been introduced in newer versions of 'lp-solve'
that prevent these semi-continuous variables from being handled correctly.
So maybe it's not the fault of the R package 'lpsolve' and can only be
amended by the 'lp-solve' team itself.

Hans Werner


pragathichi wrote:
> 
> How to define bounds for a semi continous variable in lp_solve.
> Min 5x1 +9x2 +7.15x3 +0.1x4
> subject to 
> x1+x2+x3+x4=6.7
> x1+x4 <= 6.5
> And x3 can be 0 or greater than 3.6
> hence x3 is  a semi continous variable 
> how to define bounds as well as semicontinous function because using 
> set.semicont and set. bound simantaneously doesn't seem to work.Thanks in
> advance for the help
> 

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