the number of files between two elements of a cell

Hi, I want to know the number of * .inf files between two elements of a cellthe number of * .inf files between two elements of a cell

here is my example in this picture ,so I want to indicate a start date and an end date

after i want to have the number of files that exists between these two dates, taking into account all the files have the same dates

here is an example:

start_date=20190102

end_date=20190128

we need a program that verifies just the first six characters of each name or else, I'm lost

Answer 1

[Stephen23]

An effiicent method based on simple logical comparisons of numeric vectors (serial date numbers):

>> d1 = '20190102';
>> d2 = '20190128';
>> n1 = datenum(d1,'yyyymmdd')
n1 =
      737427
>> n2 = datenum(d2,'yyyymmdd')
n2 =
      737453
>> num = datenum(regexp(matchList,'^\d{8}','once','match'),'yyyymmdd')
num =
      737427
      737447
      737448
      737455
      737456
>> idx = n1<=num & num<=n2
idx =
     1
     1
     1
     0
     0
>> nnz(idx)
ans =
     3

[Stephen23]

@Mustapha Messaoud: as well as saying "thanks" you can vote for my answer (which actually works correctly, unlike the one that you accepted).

[OCDER]

Yup, Stephen is right. My answer doesn't work for different months and years. I'll delete that answer so that others don't use it. The use of datetime is much better.

[Ishak Oussama]

(Stephen Cobeldick) thank you very much for your answer, I am a beginner in matlab, so I voted and accepted your answer.

I have another question about that , I want to make a graphical interface with pop-up menu

I want to put d1 as follows:

pop -up menu for day

pop -up menu for -month

pop -up menu for -year ,and same thing for d2 using your solution

and display the result in an edit txt