Mercurial > hg > camir-aes2014
comparison toolboxes/FullBNT-1.0.7/bnt/CPDs/@tabular_kernel/Old/tabular_kernel.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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-1:000000000000 | 0:e9a9cd732c1e |
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1 function K = tabular_kernel(fg, self) | |
2 % TABULAR_KERNEL Make a table-based local kernel (discrete potential) | |
3 % K = tabular_kernel(fg, self) | |
4 % | |
5 % fg is a factor graph | |
6 % self is the number of a representative domain | |
7 % | |
8 % Use 'set_params_kernel' to adjust the following fields | |
9 % table - a q[1]xq[2]x... array, where q[i] is the number of values for i'th node | |
10 % in this domain [default: random values from [0,1], which need not sum to 1] | |
11 | |
12 | |
13 if nargin==0 | |
14 % This occurs if we are trying to load an object from a file. | |
15 K = init_fields; | |
16 K = class(K, 'tabular_kernel'); | |
17 return; | |
18 elseif isa(fg, 'tabular_kernel') | |
19 % This might occur if we are copying an object. | |
20 K = fg; | |
21 return; | |
22 end | |
23 K = init_fields; | |
24 | |
25 ns = fg.node_sizes; | |
26 dom = fg.doms{self}; | |
27 % we don't store the actual domain since it may vary due to parameter tieing | |
28 K.sz = ns(dom); | |
29 K.table = myrand(K.sz); | |
30 | |
31 K = class(K, 'tabular_kernel'); | |
32 | |
33 | |
34 %%%%%%% | |
35 | |
36 | |
37 function K = init_fields() | |
38 % This ensures we define the fields in the same order | |
39 % no matter whether we load an object from a file, | |
40 % or create it from scratch. (Matlab requires this.) | |
41 | |
42 K.table = []; | |
43 K.sz = []; | |
44 | |
45 |