how to find non zero minimum

305 次查看（过去 30 天）
maryam
maryam 2014-10-4
编辑： Selina KOLOKYTHA 2024-2-9
hi, i have a [8200,1] matrix with zero and positive values. i need to find non zero minimum. please guide me if you can

请先登录，再回答此问题。

采纳的回答

maryam
maryam 2014-10-4
this is simple :) name the matrix A (for example) then : m=min(A(A>0)); m returns the non zero minumum
  2 个评论
Charanraj
Charanraj 2019-12-1
Ho to do this columnwise. For example, I have 200 columns and I need to find in each column the minimum non zero. Thanks
Selina KOLOKYTHA
Selina KOLOKYTHA 2024-2-9
编辑：Selina KOLOKYTHA 2024-2-9
Hi! Here you go:
% if A is your matrix
C=200 % number of columns
for i=1:C % for each column i
B=A(:,i); % assign each column of A to B
m(i)=min(B(B>0)); % m returns the non zero minumum of each column i
end
Note that this only works if matrix A has zero to positive values - not if it has negative values.

请先登录，再进行评论。

更多回答（2 个）

Zoltán Csáti
Zoltán Csáti 2014-10-4
Lets suppose your matrix is called A. Then you first select those elements that are non-zero (i.e. positive) and after that use the min function:
min(A(A > 0))
Erick Medina
Erick Medina 2017-11-28
Declare a temp_variable which is a copy of your target vector and delete all indexes equal to zero.
temp_vec = vec; temp_vec(temp_vec==0) = []; min(temp_vec)

类别

在 Help Center 和 File Exchange 中查找有关 Logical 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