Randomly select a number from a column of a stored matrix, stores the respective row

1 次查看（过去 30 天）
Akana Juliet
Akana Juliet 2021-6-17
评论： Akana Juliet 2021-6-17
I am a novice MATLAB user, so please bear with me. I have a 256x5 double value stored, and the first column is just the numbers 0-255. The next 4 columns are a sequence of 4 numbers in a specific order.
I am trying to write a code that selects a number from Column 1 at random(0-255), and then subsequently saves the respective 4 element array/vector (of the row selected). How do you think I can accomplish this?

请先登录，再回答此问题。

采纳的回答

Sky Sartorius
Sky Sartorius 2021-6-17
You can use randi to randomly generate the index you need,
rowInd = randi(256,1);
then use that index to pull out the row from your matrix M:
fourElementVector = M(rowInd,2:end);
Of course this can also be done in one step:
M(randi(256,1),2:end);

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息

标签

产品


版本

R2019a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by