How to judge the duplicate value of the previous loop and the current loop in the loop

a = [201101 201107 201201 201207 201301 201307 201401 201407 201501 201507]

for k = 1:2

if k =mod(k,2)==1

index =(1:5)

year = a(index)

else k = mod(k,2)==0

year = index =(2:6)

end

how can find repeat value a(index(2:5))

is any way to detect or find out the existence of these duplicate values

Answer 1

[David Hill]

Not sure what you are asking. Of course there are going to be repeated values in the year rows. You need to explain better with an example.

a =  [201101 201107 201201 201207 201301 201307 201401 201407 201501 201507]
for  k = 1:2
  if mod(k,2)==1
    year(k,:) = a(1:5);
  else
    year(k,:) = a(2:6); 
  end
end

[peter huang]

I mean. When I get data about the date in the department, I want to use one year and two months as the time unit of the data in the department, but when I read it, I often read the time of the previous year and two months repeatedly. I would like to ask if there is a way to detect whether this loop repeats the value of the last loop