Finding series of values within array
Hi, I am up for a problem which I cannot totally solve.
Imagine I have an array: testtimes=[0.2 1.2 1.202 1.205 1.209 1.8 2.1 2.6 2.604 2.606 3.601 3.603 3.605];
Now I need to find all series of values where the difference between values is less than 0.01. So for now I did this:
if true
% code
end
% reference = 0.01
% isitesttimes=diff(testtimes); belowBIthreshold=(isitesttimes<reference);
% belowBIthreshold = [false, belowBIthreshold, false];
% edges = diff(belowBIthreshold);
% rising = find(edges==1); falling = find(edges==-1); spanWidth = falling – rising; wideEnough = spanWidth >= 3;
% startPos = rising(wideEnough);
% endPos = falling(wideEnough)-1;
% allInSpan = cell2mat(arrayfun(@(x,y) x:1:y, startPos, endPos, ‘uni’, false))
However, the answer now is
allInSpan = 2 3 4
Which means that on position 2,3,4 in testtimes the values are postioned which have a difference less than 0.01. However, the correct answer in this example would be 2,3,4,5 (since also position 5 has a difference of less than 0.01 compared to the one on position 4) (apart from that 8,9,10,11,12,13 should also be in the answer but that has to do (I guess) with the cut-off/Span-Width of 3).
Preferably I would get a variable which has per row the positions of the testtimes, so:
Answer = 2,3,4
8,9,10
11,12,13 (because between 10 and 11 there is more than 0.01 difference)
Can somebody help me out?
Regards
PS I know that there are more topics about this but I couldn’t find the one which specifically adressess this question.Hi, I am up for a problem which I cannot totally solve.
Imagine I have an array: testtimes=[0.2 1.2 1.202 1.205 1.209 1.8 2.1 2.6 2.604 2.606 3.601 3.603 3.605];
Now I need to find all series of values where the difference between values is less than 0.01. So for now I did this:
if true
% code
end
% reference = 0.01
% isitesttimes=diff(testtimes); belowBIthreshold=(isitesttimes<reference);
% belowBIthreshold = [false, belowBIthreshold, false];
% edges = diff(belowBIthreshold);
% rising = find(edges==1); falling = find(edges==-1); spanWidth = falling – rising; wideEnough = spanWidth >= 3;
% startPos = rising(wideEnough);
% endPos = falling(wideEnough)-1;
% allInSpan = cell2mat(arrayfun(@(x,y) x:1:y, startPos, endPos, ‘uni’, false))
However, the answer now is
allInSpan = 2 3 4
Which means that on position 2,3,4 in testtimes the values are postioned which have a difference less than 0.01. However, the correct answer in this example would be 2,3,4,5 (since also position 5 has a difference of less than 0.01 compared to the one on position 4) (apart from that 8,9,10,11,12,13 should also be in the answer but that has to do (I guess) with the cut-off/Span-Width of 3).
Preferably I would get a variable which has per row the positions of the testtimes, so:
Answer = 2,3,4
8,9,10
11,12,13 (because between 10 and 11 there is more than 0.01 difference)
Can somebody help me out?
Regards
PS I know that there are more topics about this but I couldn’t find the one which specifically adressess this question. Hi, I am up for a problem which I cannot totally solve.
Imagine I have an array: testtimes=[0.2 1.2 1.202 1.205 1.209 1.8 2.1 2.6 2.604 2.606 3.601 3.603 3.605];
Now I need to find all series of values where the difference between values is less than 0.01. So for now I did this:
if true
% code
end
% reference = 0.01
% isitesttimes=diff(testtimes); belowBIthreshold=(isitesttimes<reference);
% belowBIthreshold = [false, belowBIthreshold, false];
% edges = diff(belowBIthreshold);
% rising = find(edges==1); falling = find(edges==-1); spanWidth = falling – rising; wideEnough = spanWidth >= 3;
% startPos = rising(wideEnough);
% endPos = falling(wideEnough)-1;
% allInSpan = cell2mat(arrayfun(@(x,y) x:1:y, startPos, endPos, ‘uni’, false))
However, the answer now is
allInSpan = 2 3 4
Which means that on position 2,3,4 in testtimes the values are postioned which have a difference less than 0.01. However, the correct answer in this example would be 2,3,4,5 (since also position 5 has a difference of less than 0.01 compared to the one on position 4) (apart from that 8,9,10,11,12,13 should also be in the answer but that has to do (I guess) with the cut-off/Span-Width of 3).
Preferably I would get a variable which has per row the positions of the testtimes, so:
Answer = 2,3,4
8,9,10
11,12,13 (because between 10 and 11 there is more than 0.01 difference)
Can somebody help me out?
Regards
PS I know that there are more topics about this but I couldn’t find the one which specifically adressess this question. find MATLAB Answers — New Questions
