A = [1:3; 4:6; 7:9]
A =
1 2 3
4 5 6
7 8 9A(1:2, 1:2)
ans =
1 2
4 5 A([3, 1], [3, 1])
ans =
9 7
3 1It defines the subset of an array. Say you want the first column of the matrix, then you writeMaylis said:
A(1:3,1)
ans =
1
4
7The notation [3, 1] defines a row vector. What A([a, b], [c, d]) does is that it makes a 2x2 matrix with elementsMaylis said:
A([3,1],[2,3,1,2])
ans =
8 9 7 8
2 3 1 2Index notation in MATLAB is a way of accessing and manipulating elements in a multidimensional array. It uses numeric values to specify the position of an element in the array.
A 2D array can be created in MATLAB by using the "zeros" or "ones" function, or by manually inputting values into a matrix using square brackets.
To access an element in a 2D array, you need to specify the row and column index separated by a comma. For example, array(2,3) would access the element in the second row and third column of the array.
Yes, index notation can be used to modify elements in a 2D array. Simply assign a new value to the specified index to change the element.
Yes, besides index notation, you can also use logical indexing, which involves creating a logical array to specify which elements you want to access. You can also use the "end" keyword to access the last element in a particular dimension.