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Re: Same .m file: different results with different versions of Octave


From: Thomas D. Dean
Subject: Re: Same .m file: different results with different versions of Octave
Date: Wed, 21 Apr 2010 17:32:33 -0700

On Wed, 2010-04-21 at 18:48 -0400, Judd Storrs wrote:
> On Wed, Apr 21, 2010 at 2:20 PM, Judd Storrs <address@hidden> wrote:
> > Here's an updated patch and c99 test code for the bug that was
I think it is fixed...  Thanks.

octave
octave:2> do_tanh(400,410)
 400    0.000000e+00    0.000000e+00*i
 401    0.000000e+00   -0.000000e+00*i
 402    0.000000e+00   -0.000000e+00*i
 403    0.000000e+00    0.000000e+00*i
 404    0.000000e+00   -0.000000e+00*i
 405    0.000000e+00   -0.000000e+00*i
 406    0.000000e+00    0.000000e+00*i
 407    0.000000e+00   -0.000000e+00*i
 408    0.000000e+00   -0.000000e+00*i
 409    0.000000e+00    0.000000e+00*i
 410    0.000000e+00   -0.000000e+00*i
octave:3> do_tanh(340,357)
 340    1.000000e+00   9.452730e-296*i
 341    1.000000e+00  -3.508364e-297*i
 342    1.000000e+00  -1.336150e-297*i
 343    1.000000e+00   2.147602e-298*i
 344    1.000000e+00   2.821408e-301*i
 345    1.000000e+00  -3.965249e-300*i
 346    1.000000e+00   4.414730e-301*i
 347    1.000000e+00   2.289914e-302*i
 348    1.000000e+00  -1.066519e-302*i
 349    1.000000e+00   7.819006e-304*i
 350    1.000000e+00   1.072675e-304*i
 351    1.000000e+00  -2.640348e-305*i
 352    1.000000e+00   1.009381e-306*i
 353    1.000000e+00   3.699012e-307*i
 354    1.000000e+00  -6.015265e-308*i
 355    1.000000e+00   5.397390e-313*i
 356    0.000000e+00    0.000000e+00*i
 357    0.000000e+00   -0.000000e+00*i

LD_PRELOAD="/home/tomdean/Gnu/lib/libm.so" octave
octave:2> do_tanh(400,410)
 400    1.000000e+00    0.000000e+00*i
 401    1.000000e+00   -0.000000e+00*i
 402    1.000000e+00   -0.000000e+00*i
 403    1.000000e+00    0.000000e+00*i
 404    1.000000e+00   -0.000000e+00*i
 405    1.000000e+00   -0.000000e+00*i
 406    1.000000e+00    0.000000e+00*i
 407    1.000000e+00   -0.000000e+00*i
 408    1.000000e+00   -0.000000e+00*i
 409    1.000000e+00    0.000000e+00*i
 410    1.000000e+00   -0.000000e+00*i
octave:3> do_tanh(-20,20)
 -20   -1.000000e+00   -6.331009e-18*i
 -19   -1.000000e+00   -1.860681e-17*i
 -18   -1.000000e+00    4.600907e-16*i
 -17   -1.000000e+00   -1.813599e-15*i
 -16   -1.000000e+00   -1.396672e-14*i
 -15   -1.000000e+00    1.849125e-13*i
 -14   -1.000000e+00   -3.746302e-13*i
 -13   -1.000000e+00   -7.791958e-12*i
 -12   -1.000000e+00    6.837360e-11*i
 -11   -1.000000e+00    4.938089e-12*i
 -10   -1.000000e+00   -3.763441e-09*i
  -9   -1.000000e+00    2.287504e-08*i
  -8   -1.000000e+00    6.479851e-08*i
  -7   -9.999998e-01   -1.647437e-06*i
  -6   -9.999896e-01    6.593568e-06*i
  -5   -1.000076e+00    4.940080e-05*i
  -4   -1.000097e+00   -6.638502e-04*i
  -3   -9.952503e-01    1.378633e-03*i
  -2   -1.023836e+00    2.839295e-02*i
  -1   -1.083923e+00   -2.717526e-01*i
   0    0.000000e+00    0.000000e+00*i
   1    1.083923e+00    2.717526e-01*i
   2    1.023836e+00   -2.839295e-02*i
   3    9.952503e-01   -1.378633e-03*i
   4    1.000097e+00    6.638502e-04*i
   5    1.000076e+00   -4.940080e-05*i
   6    9.999896e-01   -6.593568e-06*i
   7    9.999998e-01    1.647437e-06*i
   8    1.000000e+00   -6.479851e-08*i
   9    1.000000e+00   -2.287504e-08*i
  10    1.000000e+00    3.763441e-09*i
  11    1.000000e+00   -4.938089e-12*i
  12    1.000000e+00   -6.837360e-11*i
  13    1.000000e+00    7.791958e-12*i
  14    1.000000e+00    3.746302e-13*i
  15    1.000000e+00   -1.849125e-13*i
  16    1.000000e+00    1.396672e-14*i
  17    1.000000e+00    1.813599e-15*i
  18    1.000000e+00   -4.600907e-16*i
  19    1.000000e+00    1.860681e-17*i
  20    1.000000e+00    6.331009e-18*i

octave:22> do_tanh(340,357)
 340    1.000000e+00   9.452730e-296*i
 341    1.000000e+00  -3.508364e-297*i
 342    1.000000e+00  -1.336150e-297*i
 343    1.000000e+00   2.147602e-298*i
 344    1.000000e+00   2.821408e-301*i
 345    1.000000e+00  -3.965249e-300*i
 346    1.000000e+00   4.414730e-301*i
 347    1.000000e+00   2.289914e-302*i
 348    1.000000e+00  -1.066519e-302*i
 349    1.000000e+00   7.819006e-304*i
 350    1.000000e+00   1.072675e-304*i
 351    1.000000e+00  -2.640348e-305*i
 352    1.000000e+00   1.009381e-306*i
 353    1.000000e+00   3.699012e-307*i
 354    1.000000e+00  -6.015265e-308*i
 355    1.000000e+00   5.397390e-313*i
 356    1.000000e+00    0.000000e+00*i
 357    1.000000e+00   -0.000000e+00*i




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