Matlab的cell转成double

matlab将cell转成double

       V = importdata('数据1.xls');
       A=V(2:365,4);
       
%A为cell型的行向量或列向量，data为转换后的double型数组
        len=length(A);
        data=zeros(len,1);        
        for i=1:len
            data(i)=str2num(cell2mat(V(startday-1+i,4)));
        end