如何解决：使用horzcat时发生错误所连接矩阵的维数不一致

Question

Everything is fine in the concatenation step. When I am saving these variables (each variable has size 30x180) and I am labeling it in the Labeling step, I got this error, help with this?

What I want is to add the label number to each row of the feature matrix Class1 .

 Error using horzcat Dimensions of matrices being concatenated are not consistent. Error in CONCAT (line 16) dlmwrite(strcat('E:\\Matlab Projects\\FER\\Features\\','.txt'), [Class1 1] , 'delimiter', '\\t','-append','roffset',0, 'precision', 4); 

% Concatenation Step
class1 = cat(2,(load(fullfile('.', 'Features', 'ANG1.txt'))), (load(fullfile('.', 'Features', 'ANG11.txt'))));

% Labeling Step
dlmwrite(strcat('E:\Matlab Projects\FER\Features\','.txt'), [Class1 1] , 'delimiter', '\t','-append','roffset',0, 'precision', 4);

Answer 1

Given a matrix Class1 or arbitrary size, adding a 1 at the end of each row is accomplished as follows:

nrows = size(Class1,1);
[Class1 ones(nrows,1)]

The ones function creates a matrix with ones, of the requested size. Here, we're using the number of rows in Class1 , so that the two matrices have the same number of rows and can be concatenated.

In general, to add an arbitrary number n , you can do either:

[Class1, ones(nrows,1) * n]

or:

[Class1, zeros(nrows,1) + n]

or:

[Class1, repmat(n,nrows,1)]