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POLY_FIT gives wrong answer !


Maybe all of you already know this, but I didn't and I could not find
any documentation about it.
The problem : I have two long arrays (x- and y-values) and I made
subarrays out of them by using an array as subscript, like
    x = fltarray(l)
    y = fltarray(l)
    indexarr = longarray(l)
(you know, the way to sort different arrays together)
However, when I do something like out =
poly_fit(x[indexarr],y[indexarr]), the outcome is simply wrong !  I know
this because other programs gave another solution (all the same).
The only way to do it right is by making other arrays like x2 and y2 and
doing a poly_fit on it.

Is this a known issue ?




 Henk Schets
 Royal Meteorological Institute of Belgium (R.M.I.B.)
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 Tel: (+32) 2 3730597
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