matlab报错：元胞内容引用自非元胞数组对象

Question

 filename=uigetfile('*.mat;*.txt');
    f=load(filename);
    for i=1:1:numel(f)
        b=f{i};
        if strncmpi(b,'byb1',4)
         xtm=b;
        elseif strncmpi(a,'byb2',4)
         xtc=b;
        elseif strncmpi(a,'traindata',9)
         xcm=b;
        elseif strncmpi(a,'testdata',8)
         xpc=b;
        elseif strncmpi(a,'trainlab',8)
         yc=b;
        elseif strncmpi(f,'testlab',7)
         yp=b;
        end
    end
  [RMSEP,RMSEC,Ryu,MREyu,xre,yc,xpcm,yp1]=pdspls(xtm,xtc,xcm,xpc,yc,yp,0.01,handles.win,handles.lv);

报错：元胞内容引用自非元胞数组对象。提示我b={i}出错。
图片是我导入工作区里的mat文件，也就是变量f

这是哪里出错了？

Answer 1

同学啊，为啥你用f=load(fileName)呢

filename=uigetfile('*.mat;*.txt');
f=load(filename);
    for i=1:1:numel(f)
        b=fileName{i};
        if strncmpi(b,'byb1',4)
         xtm=f.{'xtm'};%可以类似这种。。。
        end
    end
  [RMSEP,RMSEC,Ryu,MREyu,xre,yc,xpcm,yp1]=pdspls(xtm,xtc,xcm,xpc,yc,yp,0.01,handles.win,handles.lv);