how to rename fields in struc and adding new field name
조회 수: 4 (최근 30일)
이전 댓글 표시
Hello everyone
I have a stuct to work wit and i wonted to rename the field name (XX) by 'Area (km2)' and also i wanted to add new filed column between YY and ZZ as shown below.
wish you best
댓글 수: 0
채택된 답변
Walter Roberson
2020년 12월 17일
struct fieldnames must be valid MATLAB identifiers, so spaces and brackets are not permitted.
The characters are permitted in the names of Variables in table() objects.
To add a new field at a particular location, the easiest way is to add the new field and then to use orderfields() to change the order.
댓글 수: 3
Walter Roberson
2020년 12월 21일
foo = struct('a', 1, 'b', 2, 'd', 4);
foo.c = 3
%new field has been added but it is out of place
newfoo = orderfields(foo, {'d', 'c', 'b', 'a'})
%and now it is in very specific place
추가 답변 (1개)
Jan
2020년 12월 21일
Adding a field at the end is trivial:
porositiy.newField = [];
Adding a field at a specific location is a bad idea, because the order of fields is not really fixed. But it works:
function S = AddFieldAfter(S, AfterField, NewField, NewData)
SField = fieldnames(S);
SData = struct2cell(S);
nS = numel(S);
sizeS = size(S);
index = find(strcmp(SField, AfterField));
if ~isempty(index)
SField = cat(1, SField(1:index), {NewField}, SField(index + 1:end));
if ~isequal(size(NewData), sizeS)
NewDataC = cell([1, nS]);
NewDataC(:) = {NewData};
end
SData = cat(1, SData(1:index, 1:nS), NewDataC, SData(index + 1:end, 1:nS));
S = reshape(cell2struct(SData, SField), sizeS);
else % Field not found, append at the end:
S.(NewField) = NewData;
end
end
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Structures에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!