GNU Octave, version 2.1.57 (i686-pc-linux-gnu).
Copyright (C) 2004 John W. Eaton.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTIBILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type `warranty'.

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Report bugs to <bug-octave@bevo.che.wisc.edu> (but first, please read
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octave> regression
samplesize = 6
A =

  65   1
  68   1
  67   1
  74   1
  71   1
  72   1

c =

  130
  170
  170
  170
  160
  160



octave> octave> regression
samplesize = 6
A =

  65   1
  68   1
  67   1
  74   1
  71   1
  72   1

c =

  130
  170
  170
  170
  160
  160

u =

   2.4348
  -9.2174

octave>