MATLAB: SOS: How to use datenum for a vector ?

Question

today = datenum('20110609','yyyymmdd'); 
today =
734663
D = 20110609;
d = datenum('D','yyyymmdd')
d =
734504

Why cannot the above code work ???????????????????

d1 = datenum('20110610','yyyymmdd');
d2 = datenum('20110716','yyyymmdd');
d2-d1 % it gives me 36, number of days between these two dates

HOWEVER, if I have a vector of time D(N,1), N is more than 100 K.

It looks like this: (and not sorted)

maturity = 
[20110618
20110619
20110716
20110718
20110719
20111217
...];

And I wanna to get a vector of tenor, from the date in the vector to today's date: 20110610.

How may I do that? Obviously I cannot type them in…

Any experts, plz help! Thx in advance!

Answer 1

a=[20110711 20110712 20110712]; 
b=datenum(arrayfun(@num2str,a,'un',0),'yyyymmdd');
tenor=b-datenum('20110610','yyyymmdd')