Re: Create a logical array of 0

[David Bateman]

Ok, I attach a patch that addresses the concatenation of boolean
scalars and matrices, and the indexing of booleans and integers.
The patch also addresses the issues with repmat...

Log below showing that the patch works as expected...

D.


octave:1> a = logical(1); b = a([1,1]); c= [a,a];whos a b c

*** local user variables:

  Prot Name Size  Bytes  Class
  ==== ==== ====  =====  ===== 
   rwd a    1x1       1  bool
   rwd b    1x2       2  bool matrix
   rwd c    1x2       2  bool matrix

Total is 5 elements using 5 bytes

octave:2> a = logical([1,1]); b = a([1,1]); c= [a,a];whos a b c

*** local user variables:

  Prot Name Size  Bytes  Class
  ==== ==== ====  =====  ===== 
   rwd a    1x2       2  bool matrix
   rwd b    1x2       2  bool matrix
   rwd c    1x4       4  bool matrix

Total is 8 elements using 8 bytes

octave:3> a = int8(1); b = a([1,1]); c= [a,a];whos a b c

*** local user variables:

  Prot Name Size  Bytes  Class
  ==== ==== ====  =====  ===== 
   rwd a    1x1       1  int8 scalar
   rwd b    1x2       2  int8 matrix
   rwd c    1x2       2  int8 matrix

Total is 5 elements using 5 bytes

octave:4>  a = int8([1,1]); b = a([1,1]); c= [a,a];whos a b c 

*** local user variables:

  Prot Name Size  Bytes  Class
  ==== ==== ====  =====  ===== 
   rwd a    1x2       2  int8 matrix
   rwd b    1x2       2  int8 matrix
   rwd c    1x4       4  int8 matrix

Total is 8 elements using 8 bytes

octave:5> a = logical(1); b = repmat(a,10,10); whos a b

*** local user variables:

  Prot Name  Size  Bytes  Class
  ==== ====  ====  =====  ===== 
   rwd a     1x1       1  bool
   rwd b    10x10    100  bool matrix

Total is 101 elements using 101 bytes

octave:6> a = logical([1,1]); b = repmat(a,10,10); whos a b

*** local user variables:

  Prot Name  Size  Bytes  Class
  ==== ====  ====  =====  ===== 
   rwd a     1x2       2  bool matrix
   rwd b    10x20    200  bool matrix

Total is 202 elements using 202 bytes

octave:7> a = int8(1); b = repmat(a,10,10); whos a b

*** local user variables:

  Prot Name  Size  Bytes  Class
  ==== ====  ====  =====  ===== 
   rwd a     1x1       1  int8 scalar
   rwd b    10x10    100  int8 matrix

Total is 101 elements using 101 bytes

octave:8> a = int8([1,1]); b = repmat(a,10,10); whos a b

*** local user variables:

  Prot Name  Size  Bytes  Class
  ==== ====  ====  =====  ===== 
   rwd a     1x2       2  int8 matrix
   rwd b    10x20    200  int8 matrix

Total is 202 elements using 202 bytes

D.

-- 
David Bateman                                address@hidden
Motorola CRM                                 +33 1 69 35 48 04 (Ph) 
Parc Les Algorithmes, Commune de St Aubin    +33 1 69 35 77 01 (Fax) 
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