将数据附加到二维数组Netcdf格式的Matlab中

I have a function which generates yout_new(5000,1) at every iteration and I want to store this data to a netcdf file and append the new data generated at every iteration into this existing file . At the 2nd iteration the stored variable size should be yout_new(5000,2) . Here is my try which doesn't work. Is there is any nice way to do it ?I have a function which generates yout_new(5000