How to convert an array to a one-line string?

Question

Ercument Kalkan 2019-5-27

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464255-how-to-convert-an-array-to-a-one-line-string

评论： Ercument Kalkan 2019-5-27

At first I have two 3x3 arrays written in string form:

A = '[2, 3, 4; 5, 1, 8; 9, 1, 4]'
B = '[7, 5, 3; 5, 2, 3; 7, 1, 5]'

The first issue is to multiple these two matrices after converting them to numerical with str2num function. This part is clear and done. But after this operation, I need to convert the result matrix back to string (or char vector) and print it to a cell in app designer:

num2str(str2num(A) * str2num(B))
ans =
  3×10 char array
    '57  20  35'
    '96  35  58'
    '96  51  50'

The problem here is the result matrix has 3 rows, which leads to an error when printing it to a cell. MATLAB wants the variable to be a character vector (not a character array) when print in a cell. So I want this matrix to be transformed into the form that:

'57 20 35; 96 35 58; 96 51 50'

or

'57 20 35 96 35 58 96 51 50'

Thanks in advance.

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Answer 1

Geoff Hayes 2019-5-27

5
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https://ww2.mathworks.cn/matlabcentral/answers/464255-how-to-convert-an-array-to-a-one-line-string#answer_376803

在 MATLAB Online 中打开

Ercument - you could try using rehape to convert your numeric matrix into a single row

C = str2num(A) * str2num(B);
D = num2str(reshape(C', 1, []))

which should create the string

'57 20 35 96 35 58 96 51 50'

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Geoff Hayes 2019-5-27

在 MATLAB Online 中打开

Please show your code. This example seems to work

>> A = [1 2 3; 4 5 6; 7 8 9];
>> X = num2str(reshape(A', 1, []))

Ercument Kalkan 2019-5-27

Actually it's not an error. It is the behavior of code. It pastes the entire row at the end of the previous row without a whitespace. Thanks for help.

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