CODEWITHSUNDEEP
matlabsorting
gabboshow
gabboshow

Reputation: 5559

find if an element of 1 array is present in another array without sorting

I have 1 vector representing some of the days of a week

daysweek = [5 6 7 1 2 3]; % (1 = sunday,  2= monday,..., 7 = saturday)

I want to count how many sundays, mondays etc are present in my vector.

What I do is define a vector: 

uniquedays = [1 2 3 4 5 6 7];%sorted so I can use hist

count how many instances present in my original vector "daysweek" exists in uniquedays.

countdays = hist(daysweek, uniquedays);

countdays will be then 1 1 1 0 1 1 1.

My problem is that I would like to have countdays with the first element referring to Monday and not to Sunday so it should be 1 1 0 1 1 1 1 (like if uniquedays is 2 3 4 5 6 7 1)

Thanks

Upvotes: 0

Views: 85

Answers (1)

chappjc
chappjc

Reputation: 30579

Try circshift:

countdays = hist(daysweek, uniquedays); 
countdays = circshift(countdays,[0 -1]);

Upvotes: 2

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