using while loops and random number generators

Question

Marina Christakos 2019-1-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/441187-using-while-loops-and-random-number-generators

编辑： Kevin Phung 2019-1-24

var = 'y';
while (var=='y')
    u=input('how many?', 's');
    if (u > 0)
       r = rand(1,u,'single'); 
       randnum = ['Your Random Number Is:', num2str(r)];
       disp(randnum);
       var = input('Continue?', 's');
    end
    if (var ~='y')
        disp('Program Terminated');
    end
end

Problem asked to write a code where the user types a number (the amount of random numbers they want) and asked if they would like to continue generating random numbers (works if they type 'y'). If they type any other letter, the program is terminated. I've written this code for individual random numbers, but when i try to include the "how many" part, I get errors. I keep struggling with the r = rand(1,u,'single'); line. No matter how many times I change the code and try new things it doesn't work. How would I fix this error and allow the code to work properly?

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Answer 1

Kevin Phung 2019-1-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/441187-using-while-loops-and-random-number-generators#answer_357771

编辑：Kevin Phung 2019-1-24

在 MATLAB Online 中打开

you needed one more line:

var = 'y';
while (var=='y')
    u=input('how many?', 's');
    u = str2num(u);  % u was a char, not a numeric. 
    if (u > 0)
       r = rand(1,u,'single'); 
       randnum = ['Your Random Number Is:', num2str(r)];
       disp(randnum);
       var = input('Continue?', 's');
    end
    if (var ~='y')
        disp('Program Terminated');
    end
end