I need to make groups from array

14 次查看（过去 30 天）
zhoug zho
zhoug zho 2021-6-30
编辑： zhoug zho 2021-7-1
I have this array, I need to make groups of these 14 elements with the rule that if value of a new element is 1 to 5 percent higher than the value of previous elements then the new element will be part of previous group, otherwise new group will start if it is higher than 5%. Thanks
  5 个评论
显示 3更早的评论
zhoug zho
zhoug zho 2021-6-30
Yes I need to compare all adjacent elements to form groups. Like firstly I compare element one and two and then two and three and then three and four, and so on.
zhoug zho
zhoug zho 2021-6-30
can you give an example based on our discussion, . then i will try to adjust the loop according to my need.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2021-6-30
Ran in:
A = [.06, .18, .15, .14, .13, .12, .125, .15, .105, .115, .34, .32, .03 .14]
A = 1×14
0.0600 0.1800 0.1500 0.1400 0.1300 0.1200 0.1250 0.1500 0.1050 0.1150 0.3400 0.3200 0.0300 0.1400
mask = A(2:end) > 1.05 * A(1:end-1);
group_lengths = diff([0, find(mask), length(A)])
group_lengths = 1×6
1 6 2 1 3 1
mat2cell(A, 1, group_lengths)
ans = 1×6 cell array
{[0.0600]} {[0.1800 0.1500 0.1400 0.1300 0.1200 0.1250]} {[0.1500 0.1050]} {[0.1150]} {[0.3400 0.3200 0.0300]} {[0.1400]}
  6 个评论
显示 4更早的评论
Walter Roberson
Walter Roberson 2021-7-1
Ran in:
A = [.06, .18, .15, .14, .13, .12, .125, .15, .105, .115, .34, .32, .03 .14]
A = 1×14
0.0600 0.1800 0.1500 0.1400 0.1300 0.1200 0.1250 0.1500 0.1050 0.1150 0.3400 0.3200 0.0300 0.1400
mask = A(2:end) < 0.95 * A(1:end-1) | A(2:end) > 1.05 * A(1:end-1);
group_lengths = diff([0, find(mask), length(A)])
group_lengths = 1×13
1 1 1 1 1 2 1 1 1 1 1 1 1
mat2cell(A, 1, group_lengths)
ans = 1×13 cell array
{[0.0600]} {[0.1800]} {[0.1500]} {[0.1400]} {[0.1300]} {[0.1200 0.1250]} {[0.1500]} {[0.1050]} {[0.1150]} {[0.3400]} {[0.3200]} {[0.0300]} {[0.1400]}
zhoug zho
zhoug zho 2021-7-1
编辑：zhoug zho 2021-7-1
got it... Thank you so much.

请先登录，再进行评论。

更多回答（1 个）

David Hill
David Hill 2021-6-30
Some guessing. You only said it stays in group is greater by 1-5%, I assumed a new group otherwise. Anyways, you modify the below to meet your needs.
n{1}=yourArray(1);
c=1;
for k=2:length(yourArray)
if yourArray(k)<=1.05*yourArray(k-1)&&yourArray(k)>=1.01*yourArray(k-1)
n{c}=[n{c},yourArray(k)];
else
c=c+1;
n{c}=yourArray(k);
end
end
  2 个评论
Walter Roberson
Walter Roberson 2021-6-30
However, if it is lower it needs to stay with the group being built according to https://www.mathworks.com/matlabcentral/answers/868868-i-need-to-make-groups-from-array#comment_1613113 and that means that you should not be testing against a lower bound. The 1% is a red herring; the only question is more than 5% increase (new group) otherwise continue the same group.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 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