what is wrong with my code? vertcat error

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EEEmatlab
EEEmatlab 2017-10-30
评论： DGM 2024-4-6
t = [0:0.4:40];
a = [20.*sin(t); 20.*cos(t); 0];
b = [0; 0; (10-((t.^2)/16))];
s = a+b
It gives me: Error using vertcat Dimensions of matrices being concatenated are not consistent. what is wrong?
  1 个评论
Stephen23
Stephen23 2017-10-30
编辑：Stephen23 2017-10-30
You are trying to concatenate vectors with different numbers of columns:
>> size(t)
ans =
1 101
>> size(0)
ans =
1 1
t has 101 columns (as do sin and cos outputs too), whereas 0 has one column. It is not possible to vertically concatenate arrays with different numbers of columns.

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回答（3 个）

M
M 2017-10-30
You are trying to define a matrix that can not exist.
In your case, t is a vector of dimension 101
size(t)
ans =
1 101
and so is
20.*sin(t)
but when you write
a = [20.*sin(t); 20.*cos(t); 0];
0 is a scalar of dimension
What you should do is have a look at the function
zeros(M,N) or zeros([M,N]) is an M-by-N matrix of zeros.
Rik
Rik 2017-10-30
The dimensions of matrices being concatenated are not consistent. t is a row-vector, 0 is not.
Apart from that, a will have 203 elements, while b will have only 103 elements, so a+b will fail.
Puneet
Puneet 2024-4-6
A_trans = (T * [A; 1])';
Error using vertcat
  1 个评论
DGM
DGM 2024-4-6
You're trying to concatenate an array A, and the scalar 1. A has more than one column.

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