On Thu, 19 Aug 2021, Sven Schreiber wrote:
> Am 17.08.2021 um 19:42 schrieb Allin Cottrell:
> > On Tue, 17 Aug 2021, Riccardo (Jack) Lucchetti wrote:
> >
> > > Hi all,
> > >
> > > on behalf of the development team, I'm glad to announce that we're
> > > about to release gretl 2021c. The official release will take place in
> > > a week or so, but you can already see what's new by downloading and
> > > installing the 2021c release candidate:
> > >
> > > 64-bit Windows:
> > > https://sourceforge.net/projects/gretl/files/snapshots/gretl_install-64.exe/download
> > >
> >
> > Just to complete the line-up, we'd also be glad if anyone can test the
> > 32-bit Windows offering:
> >
> > https://sourceforge.net/projects/gretl/files/snapshots/gretl_install-32.exe/download
>
> Hi, do you mean the 32bit version on 32bit Windows, or is it enough to
> test the 32bit version on 64bit Windows?
It should be enough to test on 64-bit Windows.
> Anything to look out in particular?
Well, it would be nice to know if the ("secret") lpsolve function
works. Here's an example (Kantorovich's "Problem A"):
<hansl>
clear
set verbose off
n = 8 # number of variables
m = 6 # number of constraints
# objective
matrix Obj = zeros(1, n)
Obj[1] = 1
cnameset(Obj, "A m1A m2A m3A B m1B m2B m3B")
matrix R = zeros(m, n+1)
# A - B = 0
R[1,] = {1,0,0,0, -1,0,0,0, 0}
# total output of A
R[2,] = {1,-10,-20,-30, 0,0,0,0, 0}
# total output of B
R[3,] = {0,0,0,0, 1,-20,-30,-80, 0}
# m1 = m1A + m1B <= 3
R[4,] = {0,1,0,0, 0,1,0,0, 3}
# m2 = m2A + m2B <= 3
R[5,] = {0,0,1,0, 0,0,1,0, 3}
# m3 = m3A + m3B <= 1
R[6,] = {0,0,0,1, 0,0,0,1, 1}
strings S = defarray("=", "=", "=", "<=", "<=", "<=")
b = _(objective=Obj, constraints=R, ctypes=S, intvars={1,5})
ret = lpsolve(b)
print ret.variable_values
</hansl>
Running it should produce:
<output>
A 86
m1A 2.6
m2A 3
m3A 0
B 86
m1B 0.4
m2B 0
m3B 0.975
</output>
Allin
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