Get the factorial of an array

Question

Mario Youchia 2020-5-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/523888-get-the-factorial-of-an-array

回答： James Tursa 2020-5-8

How can I create a function that calculates the factorial of each number in an array and returns another array which is the factorial.

The numbers are any positive integers and they haven't a specific order, for example [1 9 1 3 7 2 5 4 0 9]; I want to input this so the output would be [1 362880 1 6 5040 2 120 24 1 362880].

Thanks in advance.

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Answer 1

James Tursa 2020-5-8

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/523888-get-the-factorial-of-an-array#answer_431096

在 MATLAB Online 中打开

The factorial( ) function is vectorized, so just call it:

>> n =  [1 9 1 3 7 2 5 4 0 9];
>> factorial(n)
ans =
  Columns 1 through 8
           1      362880           1           6        5040           2         120          24
  Columns 9 through 10
           1      362880

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Answer 2

Ameer Hamza 2020-5-8

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/523888-get-the-factorial-of-an-array#answer_431093

编辑：Ameer Hamza 2020-5-8

在 MATLAB Online 中打开

x = [1 9 1 3 7 2 5 4 0 9];
y = arrayfun(@factorial, x);

Result

>> y
y =
  Columns 1 through 6
           1      362880           1           6        5040           2
  Columns 7 through 10
         120          24           1      362880