what is the difference between matrix and array in the meaning and functions?
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mohammad
il 29 Lug 2014
Commentato: Steven Lord
il 25 Giu 2022
i want to know the difference between the matrix and array in terms of the meaning and function , if any one will answer please with an example thanks
4 Commenti
dpb
il 29 Lug 2014
An array is any ordered n-dimensional collection.
Star Strider
il 29 Lug 2014
Risposta accettata
Arun Mathew Iype
il 29 Lug 2014
Modificato: Jan
il 30 Mag 2017
I agree with what dpb said above. Here is the example which will help you visualize.
Matrix
mat_A= [1 2 3; 3 4 5; 6 7 8]
Conventionally this is shown in 2 dimenstions (2D) as:
Mat_A =
1 2 3
3 4 5
6 7 8
Arrays : May be of various dimensions. The above is a 2D array or matrix. A 1D array is called a vector. arr_1D = [1 2 3 4 5 6 7 8 9] We can also have 3D, as well as, ND arrays. In case of a 3D array, imagine a Rubik’s cube with each cell having a value inside it.
Here is and example using MATLAB "rand" function >> Arr_3D = rand(2,2,2)
Arr_3D(:,:,1) =
0.8147 0.1270
0.9058 0.9134
Arr_3D(:,:,2) =
0.6324 0.2785
0.0975 0.5469
3 Commenti
Steven Lord
il 25 Giu 2022
Another way to explain this is by looking at the help text for the ismatrix function.
help ismatrix
So a 1-by-1 array is a matrix. A 3-by-3 array is also a matrix. But a 2-by-3-by-4 array is not a matrix.
ismatrix(zeros(1, 1))
ismatrix(zeros(3, 3))
ismatrix(zeros(2, 3, 4))
Più risposte (1)
Robin Szeto
il 30 Mag 2017
All MATLAB variables are multidimensional arrays, no matter what type of data. A matrix is a two-dimensional array often used for linear algebra. source: https://www.mathworks.com/help/matlab/learn_matlab/matrices-and-arrays.html
2 Commenti
Stephen23
il 30 Mag 2017
Modificato: Stephen23
il 30 Mag 2017
+1 This is true: all MATLAB array types are N-dimensional, with implicit infinite trailing singleton dimensions, as has been discussed many times before:
"Arrays in MATLAB are N-dimensional, with an infinite number of trailing singleton dimensions."
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