function?[h?display_array]?=?displayData（X?example_width）
%DISPLAYDATA?Display?2D?data?in?a?nice?grid
%???[h?display_array]?=?DISPLAYDATA（X?example_width）?displays?2D?data
%???stored?in?X?in?a?nice?grid.?It?returns?the?figure?handle?h?and?the?
%???displayed?array?if?requested.

%?Set?example_width?automatically?if?not?passed?in
if?~exist（‘example_width‘?‘var‘）?||?isempty（example_width）?
	example_width?=?round（sqrt（size（X?2）））;
end

%?Gray?Image
colormap（gray）;

%?Compute?rows?cols
[m?n]?=?size（X）;
example_height?=?（n?/?example_width）;

%?Compute?number?of?items?to?display
display_rows?=?floor（sqrt（m））;
display_cols?=?ceil（m?/?display_rows）;

%?Between?images?padding
pad?=?1;

%?Setup?blank?display
display_array?=?-?ones（pad?+?display_rows?*?（example_height?+?pad）?...
???????????????????????pad?+?display_cols?*?（example_width?+?pad））;

%?Copy?each?example?into?a?patch?on?the?display?array
curr_ex?=?1;
for?j?=?1:display_rows
	for?i?=?1:display_cols
		if?curr_ex?>?m?
			break;?
		end
		%?Copy?the?patch
		
		%?Get?the?max?value?of?the?patch
		max_val?=?max（abs（X（curr_ex?:）））;
		display_array（pad?+?（j?-?1）?*?（example_height?+?pad）?+?（1:example_height）?...
		??????????????pad?+?（i?-?1）?*?（example_width?+?pad）?+?（1:example_width））?=?...
						reshape（X（curr_ex?:）?example_height?example_width）?/?max_val;
		curr_ex?=?curr_ex?+?1;
	end
	if?curr_ex?>?m?
		break;?
	end
end

%?Display?Image
h?=?imagesc（display_array?[-1?1]）;

%?Do?not?show?axis
axis?image?off

drawnow;

end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-10-15?14:53??machine-learning-ex3\
?????目錄???????????0??2015-10-15?20:18??machine-learning-ex3\ex3\
?????文件????????1502??2013-11-12?01:39??machine-learning-ex3\ex3\displayData.m
?????文件????????2108??2015-10-15?17:17??machine-learning-ex3\ex3\ex3.m
?????文件????????2637??2013-11-12?01:39??machine-learning-ex3\ex3\ex3_nn.m
?????文件?????7511764??2013-11-12?01:39??machine-learning-ex3\ex3\ex3data1.mat
?????文件???????79592??2013-11-12?01:39??machine-learning-ex3\ex3\ex3weights.mat
?????文件????????8749??2015-02-26?07:07??machine-learning-ex3\ex3\fmincg.m
?????目錄???????????0??2015-10-15?14:53??machine-learning-ex3\ex3\lib\
?????目錄???????????0??2015-10-15?14:53??machine-learning-ex3\ex3\lib\jsonlab\
?????文件????????1624??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\AUTHORS.txt
?????文件????????3862??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\ChangeLog.txt
?????文件????????1551??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\LICENSE_BSD.txt
?????文件???????19369??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\README.txt
?????文件?????????881??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\jsonopt.m
?????文件???????18732??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\loadjson.m
?????文件???????15574??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\loadubjson.m
?????文件?????????771??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\mergestruct.m
?????文件???????17462??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\savejson.m
?????文件???????16123??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\saveubjson.m
?????文件????????1094??2015-04-03?07:08??machine-learning-ex3\ex3\lib\jsonlab\varargin2struct.m
?????文件????????1195??2015-04-03?07:08??machine-learning-ex3\ex3\lib\makeValidFieldName.m
?????文件????????3734??2015-04-03?07:08??machine-learning-ex3\ex3\lib\submitWithConfiguration.m
?????文件????????1903??2015-10-15?20:33??machine-learning-ex3\ex3\lrCostFunction.m
?????文件????????2229??2015-10-15?20:31??machine-learning-ex3\ex3\oneVsAll.m
?????文件????????1210??2015-10-15?20:32??machine-learning-ex3\ex3\predict.m
?????文件????????1526??2015-10-15?20:32??machine-learning-ex3\ex3\predictOneVsAll.m
?????文件?????????137??2013-11-12?01:39??machine-learning-ex3\ex3\sigmoid.m
?????文件????????1567??2015-02-27?15:20??machine-learning-ex3\ex3\submit.m
?????文件?????????258??2015-10-15?20:33??machine-learning-ex3\ex3\token.mat
?????文件??????293703??2015-03-11?11:48??machine-learning-ex3\ex3.pdf
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