Construct a 5 x 10 array that contains zeros. Assign elements at (row, column) (3,5), (2,4) and (1, 9) values of 44. Display the matrix.

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I am unable to assign the values to the specific element
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Steven Lord
Steven Lord el 16 de Sept. de 2021
Nothing in that problem statement you posted states that you need to assign to those three locations simultaneously.
There are ways to do it (linear indexing is one) but unless something else in the assignment tells you not to I'd assign to those three elements sequentially.
Eiman Rana
Eiman Rana el 16 de Sept. de 2021
Could you give me an example of both simultaneously and sequentially

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DGM
DGM el 16 de Sept. de 2021
Editada: DGM el 16 de Sept. de 2021
Consider an altered example:
In a 3x5 array, assign a fixed value to elements (3,3), (2,5), and (1,1)
sz = [3 5]; % array size
A = zeros(sz);
A(sub2ind(sz,[3 2 1],[3 5 1])) = 37
A = 3×5
37 0 0 0 0 0 0 0 0 37 0 0 37 0 0
This uses linear indexing to do the job. In order to calculate the indices, sub2ind() is used to convert the row and column subscripts specified in the two vectors. Linear indices are calculated column-major, so the indices for this example would be [9 14 1].

Alex
Alex el 15 de Feb. de 2024
M = zeros(5, 10)
M = 5x10
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
M(1, :) = 15:-3:0 % Row 1
Unable to perform assignment because the size of the left side is 1-by-10 and the size of the right side is 1-by-6.
M(2, :) = 10:7:73 % Row 2
M(3, 7:9) = [3, 2, 1] % Row 3
M(4, :) = 10 % Row 4
M(5, :) = linspace(12, 36, 10) % Row 5

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