MATLAB: How to combine two matrices of same size such that corresponding columns are concatenated as strings

combineMATLAB and Simulink Student Suitenumeric matrix

I am looking for ways to combine two numeric matrices of same size e.g x = [1 2;3 4], y = [4 5;6 7]

The result i am looking for is concatenation of corresponding columns similar to string concatenation: [14 25;36 47]

Best Answer

Wouldn't

10*x + y

be sufficient in your example?

Otherwise for a completely generic solution, since you want string concatenation, you need to convert to strings:

num2strcell = @(m) arrayfun(@num2str, m, 'UniformOutput', false);  %function to convert matrix to cell array of strings
x = [10 2;3 4];
y = [4 5;6 700];
str2double(strcat(num2strcell(x), num2strcell(y)))

Related Solutions

MATLAB: Does STRMATCH in MATLAB cause an error for a cell array containing a numeric value

In this example:

str = 9;
strs = strvcat('This is a string array','with two rows');
ind = strmatch(str,strs);

the normal STRMATCH is used, since the first input is not a cell array. In this case, 9 could be used as an ASCII value, and converted to a tab character. That character can then be compared with the other strings.

In this example:

str ={9};
strs = strvcat('This is a cell array of strings','with two rows');
ind = strmatch(str,strs);

@CELL/STRMATCH will be used, since the first input is a cell array. In this case, the code checks that the cell array contains strings, and converts it to a char array:

if iscellstr(str), str = char(str); end

Cell arrays of strings are special cases of cell arrays, which are commonly used to store strings together which have different lengths, and there are many instances where cell arrays of strings and strings can be used interchangeably. However, {9} is not a cell array of strings, so it is not converted to a character array, which leads to the error being thrown by this code:

if ~ischar(str) | ~ischar(strs)
    error('Requires character array or cell array of strings as inputs.')
end

MATLAB: How to convert a numerical matrix into a cell array of strings in MATLAB

The following example should illustrate how this can be achieved:

A = rand(1,5)
B = arrayfun(@num2str, A, 'UniformOutput', 0)

The NUM2STR function converts a number to the string representation of that number. This function is applied to each cell in the A array/matrix using ARRAYFUN. The 'UniformOutput' parameter is set to 0 to instruct CELLFUN to encapsulate the outputs into a cell array.

Best Answer

Related Solutions

MATLAB: Does STRMATCH in MATLAB cause an error for a cell array containing a numeric value

MATLAB: How to convert a numerical matrix into a cell array of strings in MATLAB

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