Question

尝试创建classifier_pattern时出错，如下所示。

classifier_pattern = [25,'no','fine','no';200,'no','hot','yes';100,'no','rainy','no';125,'yes','rainy','no';030,'yes','rainy','no';300,'yes','fine','yes';055,'yes','hot','no';140,'no','hot','no';020,'yes','fine','no';175,'yes','fine','yes';110,'no','hot','yes'];

Matlab错误连接的矩阵的维数不一致。

我不确定为什么会这样。后来我尝试将vertcat与另一个类似的矩阵一起使用，这也失败了。

Answer 1

您的问题是您尝试在矩阵中使用字符数组（例如'no'）。您应该将单元格数组用于混合数据类型。

看一个简单的例子

m = [1, 2, 'no'];
% >> m = '  no' because you have attempted character array concatenation, 
%               and the 1 and 2 are assumed to be ASCII whitespaces

m = [1, 2, 'no';
     3, 4, 'ya;]
% >> m = ['  no'; '  ya'] same story, now it's a 2*4 character array

m = [1, 2, 'no';
     3, 4, 'yes']
% ERROR: Dimensions not consistent
% This is because you're trying vertical concatenation of 4 and 5 element character arrays.

使用单元格数组修复此问题：

m = {1, 2, 'no';
     3, 4, 'yes'};
% >> m = 2*3 cell, as expected.

Matlab错误连接的矩阵的维数不一致

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