滚动模具并返回4个Matlab的数量

Question

我需要写一个功能来滚动一个4面模具N次并返回4次滚动的数量。我想在我的Matlab函数中使用randperm和for lop。到目前为止我有：

function [value2] = rollDie( N )

%This function inputs the number of times a 4-sided die is rolled and
%returns the number of times a 2 was rolled.

%   N = the number of times the die was rolled

x = ranperm(4);

v = x(1);

count = 0;

for v = 2

    count = count + 1;
end

我不确定这开头是否正确，但我也无法弄清楚如何根据滚动次数的输入使该函数运行N次。

Answer 1

您可以使用randi或随机整数生成器创建1到6之间的随机向量。您的代码看起来像

function count = rollDire(N)

% Produce N random rolls of a 6-sided die
rolls = randi(6,1,N);

% Count number of times we encounter the number 4
count = sum(rolls == 4);