matlab中求正态分布函数时如果输入变量是符号型的怎么办?比如说:syms n;a=[n,n];normcdf(a);得到的ans=Undefined function or method 'erfc' for input arguments of type 'sym'.Error in ==> normcdf at 68p = 0.5 * erfc(-z ./ sqrt
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![matlab中求正态分布函数时如果输入变量是符号型的怎么办?比如说:syms n;a=[n,n];normcdf(a);得到的ans=Undefined function or method 'erfc' for input arguments of type 'sym'.Error in ==> normcdf at 68p = 0.5 * erfc(-z ./ sqrt](/uploads/image/z/7117207-7-7.jpg?t=matlab%E4%B8%AD%E6%B1%82%E6%AD%A3%E6%80%81%E5%88%86%E5%B8%83%E5%87%BD%E6%95%B0%E6%97%B6%E5%A6%82%E6%9E%9C%E8%BE%93%E5%85%A5%E5%8F%98%E9%87%8F%E6%98%AF%E7%AC%A6%E5%8F%B7%E5%9E%8B%E7%9A%84%E6%80%8E%E4%B9%88%E5%8A%9E%3F%E6%AF%94%E5%A6%82%E8%AF%B4%EF%BC%9Asyms+n%EF%BC%9Ba%3D%5Bn%2Cn%5D%3Bnormcdf%28a%29%3B%E5%BE%97%E5%88%B0%E7%9A%84ans%3DUndefined+function+or+method+%27erfc%27+for+input+arguments+of+type+%27sym%27.Error+in+%3D%3D%3E+normcdf+at+68p+%3D+0.5+%2A+erfc%28-z+.%2F+sqrt)
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