MATLAB: How to find number of objects in a structure

Question

Hi I'm new to Matlab. I have the following struct array and I want to save the number of objects of struct in a variable. How can I find number of objects? Any help would be appreciated

Answer 1

Let i am creating a structure s below

    S = struct('a',  0, 'b',  1, 'c',  2);

Now when i am investigating what is inside of struture i type

>> S
    S = 
        a: 0
        b: 1
        c: 2

Now i want to access value of its first feild(which is a)

S.a
ans =
       0

for value of last feild, type this

    S.c
    ans =
         2

now let's say i want to modify value( new value of 10) of last feild(c) of strutre S , do this

S.c=10
S = 
      a: 0
      b: 1
      c: 10

if you want to delete any field of struture S , use this

   S.a=[]
S = 
      a: []
      b: 1
      c: 10

Tell me if you need to learn more about struture?

Usman