清空筛选条件
清空筛选条件

picking numbers from matrix

1 次查看（过去 30 天）
Berfin Çetinkaya
Berfin Çetinkaya 2022-3-17
评论： Berfin Çetinkaya 2022-3-17
I have a matrix and it contains some numbers. I want to select a random number from each column in this matrix and print it in another single row matrix (one of the numbers except 0). but I don't want to print the 0 values to the new matrix.
example :
my matrix :
0 4 8
5 0 0
0 4 6
2 8 0
0 0 7
new matrix :
2 4 6
how can I do that?
Thank you,
Berfin.

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2022-3-17
Ran in:
M = [0,4,8;5,0,0;0,4,6;2,8,0;0,0,7]
M = 5×3
0 4 8 5 0 0 0 4 6 2 8 0 0 0 7
fh1 = @(v)v(randperm(numel(v),1));
fh2 = @(k)fh1(nonzeros(M(:,k)));
V = arrayfun(fh2,1:size(M,2))
V = 1×3
2 4 7
  1 个评论
Berfin Çetinkaya
Berfin Çetinkaya 2022-3-17
I have one more question. Can you help me?
, I have created such a code. My goal is to get the first, third, fifth, seventh etc from matrix A. was to assign values to the columns. ( ie odd numbers ) But I need the newM matrix to assign these values. I want to choose a random number from the second column (except 0) in the newM matrix and assign it to the first column in matrix A. I want to apply the same operation on multiple column.
example :
newM matrix:
0 5 8 3
1 7 0 4
5 4 2 1
4 0 6 7
A matrix:
1 8
5 6
4 4
4 5
(I chose random number from newM 4 times)
(a column in between leaves a space)
I know it's a bit confusing, but I need help because I can't do it. I will write the first phase value below. please help me. thanks
my code =
newM=birincifaz.*(1:size(birincifaz,1))';
birincifaz=
1 1 0 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
2 1 0 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
3 1 0 1 0 1 1 1 1 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 1 0 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
5 1 0 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
6 0 0 0 0 0 1 1 0 1 0 0 0 0 1 0 0 0 1 0 1 1 1 1 1 0 0 1 1 0 0 1 0 0 1 0 1 0 1 0 1 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 1 1 1 0 0 0 1 0 0 0 1 1 0 1
7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
8 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
9 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
10 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

请先登录，再进行评论。

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

Community Treasure Hunt

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

Start Hunting!

Translated by