Which function would you use to concatenate arrays in MATLAB?

In MATLAB, the function used to concatenate arrays is 'cat()'. This function allows you to join multiple arrays along a specified dimension. The first argument of 'cat()' is the dimension along which the concatenation will occur, followed by the arrays you wish to concatenate.

For instance, if you have two arrays and you want to concatenate them vertically, you would use 'cat(1, array1, array2)'. Here, the '1' indicates that the arrays are being joined along the first dimension (rows). Conversely, if you want to concatenate them horizontally, you would use 'cat(2, array1, array2)', where '2' refers to the second dimension (columns).

The other functions listed do not serve this purpose. 'concat()' is not a built-in MATLAB function, 'join()' is used for joining strings rather than arrays, and 'arrayCombine()' is also not a standard MATLAB function for concatenation. Thus, 'cat()' is definitively the correct choice for concatenating arrays in MATLAB, highlighting the specific functionality and versatility it offers for array manipulation.