[面团儿师兄]

clc
clear
path='E:\gas_solid\CFB\2\2\';
load(sprintf('%s',[path,'r.dat']));
load(sprintf('%s',[path,'z.dat']));
sh1=load(sprintf('%s',[path,'alphs.dat']));
[m,n]=size(sh1);
sh1(:,n)=[];
r(:,n)=[];
[m,n]=size(sh1);
请各位高手帮忙读一下上面这段程序吧，尤其是载入数据时的sprintf和
[m,n]=size(sh1);
sh1(:,n)=[];
r(:,n)=[];
[m,n]=size(sh1);几个语句。