removing duplicates in an array
显示 更早的评论
If i have the following array
a =[1,1,1,2,2,1,1,6,6,6,8,8,2,2,3,3,2,2]
When i do unique(a,'stable'), i get
[1,2,6,8,3]
I want the following result
[1,2,1,6,8,2,3,2]
采纳的回答
Stephan
2019-3-3
b = a(logical([1 (diff(a)~=0)]))
2 个评论
Esegboria Osarhemen
2019-3-3
Jan
2019-3-4
(diff(a)~=0) is a logical vector. Concatenating it with a double converts it to a double. Casting it by logical() converts it again. More efficient:
b = a([true, diff(a)~=0])
Now the values are not converted twice.
更多回答（1 个）
- Package as a function
- Handle case where column-vector is given (return in same format as given)
function [uniqueSequence] = DedupSequence (seq)
% Eliminate sequentially repeated rows
% Create row vector for diff (must transpose if given a column vector)
if size(seq,1) > 1
seqCopy = seq(:,1)';
else
seqCopy = seq;
end
uniqueSequence = seq([true, diff(seqCopy)~=0]);
end
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