Counting distinct elements in a vector?

5 views (last 30 days)
James Baker on 8 May 2021
Commented: James Baker on 9 May 2021
ok lets say i have a vector A = (1 1 2 2 3 4 4 4 4 5 7 7 7) the original A vector was related to actual time, hence why its increasing....i've already used the ceil function to bucket the original elements into distinct minutes... now i want to count up the elements that occur in distinct minutes.. so, for the example above- I expect a final result of 6....i cant figure out how to come up with that code.. please help

Matt J on 8 May 2021
Edited: Matt J on 8 May 2021
numel(unique(A))
or
max(findgroups(A))
James Baker on 9 May 2021
matt,
hopefully, you don't mind a follow up question? given my A vector above in the oroginal question, what woule by the syntax to create a 2nd vector? this 2nd vector would have the values in it as follows B = (2 2 1 4 5 3). this represents the count of each unique value in the original A vector such as 2 1's, 2's, 1 3, 4 4's, 1 5 and 3 7's.and so on
James Baker on 9 May 2021
whoops he B vector should be (2 2 1 4 1 3)... not (2 2 1 4 5 3)... doh!

Categories

Find more on Logical in Help Center and File Exchange

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!