function?y?=?block_sum_2（x）
%?BLOCK_SUM_2?Compute?2x2?block?sum?of?3-D?matrix
%
%?SYNTAX
%??????y?=?block_sum_2（x）???
%
%?PARAMETERS
%??????x:?input?array???D1xD2x*
%??????y:?output?array?（D1/2）x（D2/2）x*
%
%?EXAMPLE
%??????x?=?rand（4?4?3）;
%??????y?=?block_sum_2（x）;
%
%?NOTES
%?Son?Lam?Phung?started?12-Jan-2006?revised?04-Nov-2006.

if?（ndims（x）?==?3）
????y?=?x（1:2:end?1:2:end?:）?+?x（1:2:end?2:2:end?:）?+?...
????????x（2:2:end?1:2:end?:）?+?x（2:2:end?2:2:end?:）;
elseif?（ndims（x）?==?4）
????y?=?x（1:2:end?1:2:end?:?:）?+?x（1:2:end?2:2:end?:?:）?+?...
????????x（2:2:end?1:2:end?:?:）?+?x（2:2:end?2:2:end?:?:）;
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????659??2006-11-04?15:58??cnn_matlab\block_sum_2.m

?????文件???????3422??2009-04-14?15:35??cnn_matlab\cnn_cm.m

?????文件???????7467??2006-11-05?13:49??cnn_matlab\cnn_compute_gradient.m

?????文件???????2377??2006-11-05?13:11??cnn_matlab\cnn_devectorize_wb.m

?????文件???????1242??2009-04-14?14:22??cnn_matlab\cnn_example.m

?????文件???????2156??2009-04-19?16:18??cnn_matlab\cnn_example_face.m

?????文件???????1478??2006-11-05?16:55??cnn_matlab\cnn_example_nets.m

?????文件????????360??2006-11-05?12:05??cnn_matlab\cnn_getw.m

?????文件???????1142??2006-11-05?14:15??cnn_matlab\cnn_get_init_tr.m

?????文件???????1360??2009-04-11?03:05??cnn_matlab\cnn_init.m

?????文件???????7139??2009-04-11?02:49??cnn_matlab\cnn_new.m

?????文件????????412??2006-11-05?12:06??cnn_matlab\cnn_setw.m

?????文件???????4714??2006-11-05?13:20??cnn_matlab\cnn_sim.m

?????文件???????4989??2006-11-05?13:21??cnn_matlab\cnn_sim_verbose.m

?????文件???????1192??2006-11-05?14:12??cnn_matlab\cnn_train.m

?????文件???????4220??2006-11-05?14:16??cnn_matlab\cnn_train_gd.m

?????文件???????5103??2006-11-05?14:19??cnn_matlab\cnn_train_rprop.m

?????文件???????2090??2006-11-05?13:38??cnn_matlab\cnn_vectorize_wb.m

?????文件????????684??2009-04-15?10:07??cnn_matlab\data\get_face_data.m

?????文件???15709158??2009-04-14?15:56??cnn_matlab\data\test_data.mat

?????文件??????27409??2009-04-19?16:15??cnn_matlab\data\trained_net.mat

?????文件????3154694??2009-04-14?15:48??cnn_matlab\data\train_data.mat

?????文件????????404??2006-11-05?12:03??cnn_matlab\dltanh.m

?????文件???????1546??2006-11-05?13:58??cnn_matlab\internal_testing\cnn_compute_gradient_check_script.m

?????文件???????7139??2006-11-05?13:48??cnn_matlab\internal_testing\cnn_compute_gradient_script.m

?????文件????????535??2006-11-05?16:58??cnn_matlab\internal_testing\cnn_vectorize_check_script.m

?????文件????????291??2006-11-04?23:12??cnn_matlab\internal_testing\reshape_script.m

?????文件????????345??2006-11-05?12:01??cnn_matlab\ltanh.m

?????文件????????139??2012-05-11?16:49??cnn_matlab\readme.txt

?????目錄??????????0??2009-04-21?17:21??cnn_matlab\data

............此處省略5個文件信息