硬币折腾模拟

Question

clear all
%heads>=0.5 %tails<0.5
for i=1:500
    coin=rand(1,2);     
    A=[coin];
    toss=1;
while coin(1)<.5
    coin=rand(1,2);
    B=[coin];
    toss=1+tossr;
    A=[A;B];
    C=[toss];
end
fprintf('Number of toss to obtain head  %.0f \n',toss)
end

如何制作所有折腾频率的矢量？

我想制作所有投掷的频率表

Answer 1

检查这是一个更简单的解决方案：

clear; clc; close;
toss=0;
Tossvector=[];

%heads>=0.5 %tails<0.5
for i=1:500
    coin=rand();     
    if coin <.5
        toss=toss+1;
        Tossvector=horzcat(Tossvector,toss);
    end
    if coin >.5
        fprintf('Number of toss to obtain head  %.0f \n',toss)
        toss=0;
    end
end

Answer 2

使用def my_params required_attrs = %w{lat lng} missing_params = required_attrs.select do |key| params.has_key?(key) end missing_params.empty? ? params : raise(RuntimeError, "missing params: #{missing_params.join(",")}") end

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randi