[Octave-bug-tracker] [bug #36015] unexpected sqp error

[Ben Abbott]

Update of bug #36015 (project octave):

              Item Group:        Incorrect Result => Regression             
                  Status:                   Fixed => Need Info              
             Open/Closed:                  Closed => Open                   

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Follow-up Comment #4:

I came across a bug introduced by Lacklan's changeset.

I'm attaching a simple script that triggers the error (something to do with
the values of the upper bounds requiring an equality constraint).

I'm not familiar with glpk.m, qp.m, and sqp.m, but reversing the qp.m portion
of Lacklan's changeset fixed the problem for me.


diff --git a/scripts/optimization/qp.m b/scripts/optimization/qp.m
--- a/scripts/optimization/qp.m
+++ b/scripts/optimization/qp.m
@@ -373,8 +373,8 @@
             Atmp = [Ain, gamma];
             btmp = bin;
           endif
-          ctmp = [zeros(n-n_eq, 1); ones(n_in, 1)];
-          lb = [-Inf(n-n_eq,1); zeros(n_in,1)];
+          ctmp = [zeros(n, 1); ones(n_in, 1)];
+          lb = [-Inf(n,1); zeros(n_in,1)];
           ub = [];
           ctype = repmat ("L", n_in, 1);
           [P, dummy, status] = glpk (ctmp, Atmp, btmp, lb, ub, ctype);


I'm re-opening and marking it as a regression.

Lacklan, any insight into this?

(file #39742)
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Additional Item Attachment:

File name: test_qp.m                      Size:0 KB


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