How to make a certain percentage of values in an existing matrix, between a set range of values. Probably easy but I am a newbie.

Question

Kelley Kehoe 2020-10-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/604093-how-to-make-a-certain-percentage-of-values-in-an-existing-matrix-between-a-set-range-of-values-pro

回答： Rub Ron 2020-10-3

size=[25,10];

Score=randi([50,100],size);

So I have these commands in my script to create a 25x10 matrix of randomly assigned values between 50 and 100. However I need to make 10% of those randomly assigned values between 30 and 50, with the ability to change the percentage at will. Any help would be great.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Rub Ron 2020-10-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/604093-how-to-make-a-certain-percentage-of-values-in-an-existing-matrix-between-a-set-range-of-values-pro#answer_504319

在 MATLAB Online 中打开

What about this:

size=[25,10];                 
Score=randi([50,100],size);
my_percentage = 10; 
my_piece = prod(size)*my_percentage/100;
sub_score=randi([30,50],[1, my_piece]);
rand_idx = randperm(prod(size),my_piece);
Score(rand_idx)=sub_score;