[Pkg-octave-devel] Broken packages? (splines)

[Rafael Laboissiere]

* Jordi Gutiérrez Hermoso <jordigh at octave.org> [2012-03-12 18:23]:

> What's broken about the splines package? It seems to be in high demand.

The test below fails miserably:

    x = linspace(0,2*pi,15); y = sin(x);
    assert (ppval(csape(x,[y;y]),x), [ppval(csape(x,y),x);ppval(csape(x,y),x)], 10*eps)

with the following error message:

!!!!! test failed
assert (ppval (csape (x, [y; y]), x),[ppval(csape (x, y), x); ppval(csape (x, y), x)],10 * eps) expected
   0.00000   0.43388   0.78183   0.97493   0.97493   0.78183   0.43388   0.00000  -0.43388  -0.78183  -0.97493  -0.97493  -0.78183  -0.43388  -0.00000
   0.00000   0.43388   0.78183   0.97493   0.97493   0.78183   0.43388   0.00000  -0.43388  -0.78183  -0.97493  -0.97493  -0.78183  -0.43388  -0.00000
but got
   0.00000   0.78183   0.97493   0.43388  -0.43388  -0.97493  -0.78183   0.00000   0.78183   0.97493   0.43388  -0.43388  -0.97493  -0.78183  -0.43388
   0.43388   0.97493   0.78183   0.00000  -0.78183  -0.97493  -0.43388   0.43388   0.97493   0.78183   0.00000  -0.78183  -0.97493  -0.43388  -0.00000

Besides that, function fnder is also buggy, because it relies on the old
struct names returned by mkpp.  I fixed that (I think) with the patch
attached below, but I have no clue on how to fix csape.

Rafael
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