Section: String Functions
p = strncmp(x,y,n)
where x and y are two strings.  Returns true if x
and y are each at least n characters long, and if the
first n characters from each string are the same.  Otherwise,
it returns false.
In the second form, strncmp can be applied to a cell array of
strings.  The syntax for this form is
p = strncmp(cellstra,cellstrb,n)
where cellstra and cellstrb are cell arrays of a strings
to compare.  Also, you can also supply a character matrix as
an argument to strcmp, in which case it will be converted
via cellstr (so that trailing spaces are removed), before being
compared.
--> x1 = 'astring'; --> x2 = 'bstring'; --> x3 = 'astring'; --> strncmp(x1,x2,4) ans = 0 --> strncmp(x1,x3,4) ans = 1
Here we use a cell array strings
--> x = {'ast','bst',43,'astr'}
x = 
 [ast] [bst] [43] [astr] 
--> p = strncmp(x,'ast',3)
p = 
 1 0 0 1 
Here we compare two cell arrays of strings
--> strncmp({'this','is','a','pickle'},{'think','is','to','pickle'},3)
ans = 
 1 0 0 1 
Finally, the case where one of the arguments is a matrix string
--> strncmp({'this','is','a','pickle'},['peter ';'piper ';'hated ';'pickle'],4);