>> student=rmfield(student,'age')
student = 
1x2 struct array with fields:
    test
    name
    weight
    height
    num
    add
    tel
    gender
>> student(2)
ans = 
      test: [99 65 88 78 76 98 75 96 59]
      name: 'Wei Huan'
      weight: 50
      height: 1.5800
      num: 34999
      add: 'School of Psychology.Chongqing university'
      tel: '02361703456'
      gender: 'Female'
>>