[Octave-bug-tracker] [bug #49040] lscov test failure

[Orion Poplawski]

URL:
  <http://savannah.gnu.org/bugs/?49040>

                 Summary: lscov test failure
                 Project: GNU Octave
            Submitted by: opoplawski
            Submitted on: Fri 09 Sep 2016 06:18:59 PM GMT
                Category: Test Suite
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Inaccurate Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.0-rc1
        Operating System: GNU/Linux

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Details:

>>>>> processing
/builddir/build/BUILD/octave-4.2.0-rc1/scripts/statistics/base/lscov.m
***** test
 ## Longley data from the NIST Statistical Reference Dataset
 Z = [  60323    83.0   234289   2356     1590    107608  1947
        61122    88.5   259426   2325     1456    108632  1948
        60171    88.2   258054   3682     1616    109773  1949
        61187    89.5   284599   3351     1650    110929  1950
        63221    96.2   328975   2099     3099    112075  1951
        63639    98.1   346999   1932     3594    113270  1952
        64989    99.0   365385   1870     3547    115094  1953
        63761   100.0   363112   3578     3350    116219  1954
        66019   101.2   397469   2904     3048    117388  1955
        67857   104.6   419180   2822     2857    118734  1956
        68169   108.4   442769   2936     2798    120445  1957
        66513   110.8   444546   4681     2637    121950  1958
        68655   112.6   482704   3813     2552    123366  1959
        69564   114.2   502601   3931     2514    125368  1960
        69331   115.7   518173   4806     2572    127852  1961
        70551   116.9   554894   4007     2827    130081  1962 ];
 ## Results certified by NIST using 500 digit arithmetic
 ## b and standard error in b
 V = [  -3482258.63459582         890420.383607373
         15.0618722713733         84.9149257747669
        -0.358191792925910E-01    0.334910077722432E-01
        -2.02022980381683         0.488399681651699
        -1.03322686717359         0.214274163161675
        -0.511041056535807E-01    0.226073200069370
         1829.15146461355         455.478499142212 ];
 rsd =  304.854073561965;
 y = Z(:,1); X = [ones(rows(Z),1), Z(:,2:end)];
 alpha = 0.05;
 [b, stdb, mse] = lscov (X, y);
 assert(b, V(:,1), 3e-6);
 assert(stdb, V(:,2), -1.e-5);
 assert(sqrt (mse), rsd, -1E-6);
!!!!! test failed
ASSERT errors for:  assert (b,V (:, 1),3e-6)

  Location  |  Observed  |  Expected  |  Reason
    (1)      -3482258.6346 -3482258.6346   Abs err 3.3514e-06 exceeds tol
3e-06

This has been present in Fedora rpm builds for a long time.





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