结构数组的创建输入报错

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我想创建这样的结构数组，但是运行报错，也不说原因，难道是结构数组只能有3种元素吗？

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建议结构体赋值运行前加上clear，清空之前残留的变量。比如我这里要创建5个学生的成绩

clear;
S(1) = struct('name', 'yi', 'age','18', 'yuwen',80,'shuxue',90,'waiyu',60,'wuli',90,'huaxue',100);
S(2) = struct('name', 'er', 'age','18', 'yuwen',80,'shuxue',90,'waiyu',60,'wuli',90,'huaxue',100);
S(3) = struct('name', 'san', 'age','18', 'yuwen',80,'shuxue',90,'waiyu',60,'wuli',90,'huaxue',100);
S(4) = struct('name', 'si', 'age','18', 'yuwen',80,'shuxue',90,'waiyu',60,'wuli',90,'huaxue',100);
S(5) = struct('name', 'wu', 'age','18', 'yuwen',80,'shuxue',90,'waiyu',60,'wuli',90,'huaxue',100);

效果

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