清空筛选条件
清空筛选条件

Seperating vectors when reaching a threshold value

3 次查看（过去 30 天）
oli8819
oli8819 2013-6-12
What I am trying to do is seperate a vector into other vectors when the second column of the sums to a certain values and then repeat again once it reaches a another value; so it produces seperate vectors.
For example
A(1)=[1; 3; 4; 6; 1; 2; 4; 3; 5; 2; 1; 4; 2; 4]
A(2)=[3; 5; 7; 4; 9; 1; 5; 6; 8; 9; 6; 2; 4; 1]
So when A(2) summation reaches 20, it will produce a new vector B
B(1)=[1; 3; 4; 6]
B(2)=[3; 5; 7; 4]
So when A(2) summation reaches 50 it will produce a new vector C
C(1)=[1; 2; 4; 3; 5]
C(2)=[9; 1; 5; 6; 8]
and so on.
Any help would be much appreciated
  1 个评论
Azzi Abdelmalek
Azzi Abdelmalek 2013-6-12
编辑：Azzi Abdelmalek 2013-6-12
What is A(2) summation? and What A(1) is doing in your question? and what after 20, then 50?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

David Sanchez
David Sanchez 2013-6-12
You do not have many clues of what is going on in your code, but this could be of some help and give you some ideas about what to do next:
A_1=[1; 3; 4; 6; 1; 2; 4; 3; 5; 2; 1; 4; 2; 4];
A_2=[3; 5; 7; 4; 9; 1; 5; 6; 8; 9; 6; 2; 4; 1];
sum = 0;
my_limit = 20;
for k=1:length(A_2)
sum = sum + A_2(k);
if sum > my_limit
B_1 = A_1(1:k-1);
B_2 = A_2(1:k-1);
break; % get out of for-loop
end
end
my_limit = 50;
for k2 = k:length(A_2)
sum = sum + A_2(k2);
if sum > my_limit
C_1 = A_1(k:k2-1);
C_2 = A_2(k:k2-1);
break; % get out of for-loop
end
end
Azzi Abdelmalek
Azzi Abdelmalek 2013-6-12
A{1}=[1; 3; 4; 6; 1; 2; 4; 3; 5; 2; 1; 4; 2; 4];
A{2}=[3; 5; 7; 4; 9; 1; 5; 6; 8; 9; 6; 2; 4; 1];
a=cumsum(A{2});
m=max(a);
a(end)=a(end)+1;
id=unique([20 50:50:m m]);
idx2=arrayfun(@(x) find(a>x,1),id);
idx2=[idx2(1:end-1)-1 idx2(end)];
idx1=[1 idx2(1:end-1)+1];
for k=1:numel(idx1);
out{k,1}=A{1}(idx1(k):idx2(k))';
out{k,2}=A{2}(idx1(k):idx2(k))';
end
% Check the result
%first arrays
B1=out{1,1}
C1=out{1,2}
%second arrays
B2=out{2,1}
C2=out{2,2}
%third array
B3=out{3,1}
C3=out{3,2}

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