MATLAB: Does Matlab have a permutation operator

basic operationsmatlab operatorpermutation

I just want to perform the operation

10! = 10*9*8*7*6*5*4*3*2*1,

but I can only find permutations relating to the obtaining all combinations of a vector. Is there simply an operations defined in matlab for this? Thank you!

Best Answer

There is a built-in function called factorial:

>>factorial(10)
ans=
     3628800

Related Solutions

MATLAB: Is it possible to extract the values with a vector of indices for each row without using the for statement from the matrix

see sub2ind()

A = [1, 2, 3; 4, 5, 6; 7, 8, 9; 10, 11, 12]; % reference matrix
b = [2; 1; 1; 3]; % index for each row that I want to extract
idx = sub2ind(size(A), 1:size(A,1), b.');
A(idx)

Result

>> A(idx)
ans =
     2     4     7    12

MATLAB: Multidimensional colon operator

Two approaches: 1. Reshape the matrix at first:

function A = insert_x_into_A(A,x,t)
siz = size(A);
A = reshape(A, [], siz(end));
A(:, t) = x(:);
A = reshape(A, siz);

2. Use a cell as index vector: EDITED: Cleaned up with Bruno's suggestion.

function A = insert_x_into_A(A,x,t)
idx(1:ndims(A) - 1) = {':'};
A(idx{:},t) = x;

Best Answer

Related Solutions

MATLAB: Is it possible to extract the values with a vector of indices for each row without using the for statement from the matrix

MATLAB: Multidimensional colon operator

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