Matlab tips for PGM

色々忘却の彼方へ飛んでいってしまったので、メモを残すことにします。

colonの使い方

http://www.mathworks.com/help/matlab/ref/colon.html

octave:22> A =[3,2,1;6,5,4]
A =
   3   2   1
   6   5   4
octave:23> A(:)
ans =
   3
   6
   2
   5
   1
   4
octave:24> A.'
ans =
   3   6
   2   5
   1   4

repmat (Replicate and tile array)

http://d.hatena.ne.jp/a_bicky/20100509/1273385433

setdiff

octave:118> A = [5:10]
A =
   5    6    7    8    9   10
octave:119> B = [5,7,9]
B =
  5   7   9
 octave:120> [diff, index] = setdiff(A, B)
diff =
  6    8   10
index= 
  2   4   6