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??2015-06-22?08:05??多分類邏輯回歸\
?????文件????????1502??2013-11-12?01:39??多分類邏輯回歸\displayData.m
?????文件?????????963??2015-06-22?08:02??多分類邏輯回歸\ex3.m
?????文件?????7511764??2013-11-12?01:39??多分類邏輯回歸\ex3data1.mat
?????文件????????8749??2015-02-26?07:07??多分類邏輯回歸\fmincg.m
?????文件?????????412??2015-06-22?07:49??多分類邏輯回歸\lrCostFunction.m
?????文件????????1081??2015-06-22?08:02??多分類邏輯回歸\oneVsAll.m
?????文件?????????690??2015-06-22?08:01??多分類邏輯回歸\predictOneVsAll.m
?????文件?????????137??2013-11-12?01:39??多分類邏輯回歸\sigmoid.m