Create an array from another and find the indices.
조회 수: 3 (최근 30일)
이전 댓글 표시
Hi everyone,
I have an array with variables like S,SV, V etc now I want to create a new array only with the V variable so for example;
V
SV
S
V
will become
V
V
after this I need to know the indices where I found each one of the V variables, so in this example I should get Indices = 1 and 4
Thank you for the help.
댓글 수: 2
Walter Roberson
2014년 2월 11일
Are those strings, or are they numeric values? If they are numeric values, are they scalars or vectors or arrays? If they are vectors or arrays are all of them the same size?
채택된 답변
Jos (10584)
2014년 2월 11일
MySet = {'S' 'V' 'SV' 'S' 'V' 'V' 'S' 'SV' 'V'}
MyStr = 'V'
tf = strcmp(MySet, MyStr)
index = find(tf)
KeepSet1 = MySet(tf)
KeepSet2 = repmat(MyStr,1,numel(index)) % same result
댓글 수: 2
Jos (10584)
2014년 2월 11일
Oh, I made a small mistake. I just wanted to point out that what you want to keep are only the V's. There are numel(index) elements to keep. These elements can be retrieved from MySet using the Index OR by repeating the element a number of times. The correct code, however, is:
KeepSet2 = repmat({MyStr},1,numel(index)) % between { }
추가 답변 (2개)
David Sanchez
2014년 2월 11일
most_common_string = {'V','SV','S','V','S'};
wanted_string='V';
idx = getnameidx(most_common_string,wanted_string);
idx = find(most_common_string==wanted_string);
k=1;
for i=1:numel(most_common_string)
if most_common_string{i} == 'V'
periodo(k)=i;
k = k+1;
end
end
periodo =
1 4
new_string_array = most_common_string(periodo);
new_string_array =
'V' 'V'
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