How do I convert dates to days?

Let us say I have a series of dates: '01-01-2022', '05-01-2022', '06-01-2022' and I have corresponding data on these dates how do i convert the dates to an array that looks like this: [0,4,5]

Generally something like this:

Answer 1

[Simon Chan]

Use function days

DateStrings = {'01-01-2022','05-01-2022','06-01-2022'};
t = datetime(DateStrings,'InputFormat','dd-MM-yyyy');
days(t-t(1))

ans = 1×3

0 4 5

Answer 2

[Stephen23]

Your example and explanation are inconsistent: your explanation shows difference between adjacent dates, your example vector shows differences to the first date. Here are both:

C = {'01-01-2022', '05-01-2022', '06-01-2022'};
T = datetime(C,'inputFormat','d-M-u');
V = days(T-T(1)) % what your example shows

V = 1×3

0 4 5

D = [0,caldays(caldiff(T))] % what you explained

D = 1×3

0 4 1

Answer 3

[KSSV]

Read about datevec. This will give you respective days from the dates.

[Hamza Yusuf]

DateString = {'09/16/2007';'05/14/1996';'11/29/2010'};
formatIn = 'mm/dd/yyyy';
datevec(DateString,formatIn)

yes I found the above but how do i get the number from this? It is easy when they are in the same month but what if it is like above? Different month and year?.

[KSSV]

DateString = {'09/16/2007';'05/14/1996';'11/29/2010'};
formatIn = 'mm/dd/yyyy';
[y,m,d,H,M,S] = datevec(DateString,formatIn);
d

d = 3×1

16 14 29

[Hamza Yusuf]

I am sorry this is not what i wanted. Look at the original post. I want a vector that says how many days between the dates like this:

[0, days from date 1 to date 2, days from date 2 to date 3...., days from date n-1 to date n]