在做空间面板分析时，我想比较一般面板和空间面板的区别，所以就用matlab做起了普通面板分析。但在做普通面板分析时老是出现报错的现象。
panel_d1是自带程序，是可以运行的。其程序为：
clear;
%carga los datos
load datat.txt; %Judge Example with Balanced Panel
%assign data
y= datat(:,2:3);
id = datat(:,1);
vnames =['c',% Cost
'y'];% Output

% Pooled Estimation
results = ppooled(y);
prt_panel(results,vnames);

% Fixed Effects Estimation
result1 = pfixed(y,id);
prt_panel(result1,vnames);

% Random Effects Estimation
result2 = prandom(y,id);
prt_panel(result2,vnames);

我稍微变动下，编了个panel_d程序，程序为：
clear;
%carga los datos
load ppp.txt; %Judge Example with Balanced Panel
%assign data
y= ppp(:,2:3:4);%
id =ppp(:,1);
vnames = ['y',
'x1',
'x2'];% Output

% Pooled Estimation
results = ppooled(y);
prt_panel(results,vnames);

% Fixed Effects Estimation
result1 = pfixed(y,id);
prt_panel(result1,vnames);

% Random Effects Estimation
result2 = prandom(y,id);
prt_panel(result2,vnames);
% Haussman Test
phaussman(result1, result2);


运行改程序 就出现了报错提示：
Error using ==> panel_d at 16
Error using ==> vertcat
CAT arguments dimensions are not consistent.


附件里是做面板的m文件，望高手指导！！