How do I use use logical relations on a character array?

Say like I have an array animals=[cat;dog;hamster;shark;duck;bat]. How do I get an array that only contains animals that is spelled with 4 or more letters?

Answer 1

[Stephen23]

>> a = {'cat';'dog';'hamster';'shark';'duck';'bat'};
>> a(cellfun('length',a)>3)
ans = 
    'hamster'
    'shark'
    'duck'

[Anonymous Matrix]

do i have to type out each one? because the example i gave is short and simple. but i actually have to work with a given array (that i can't manipulate) that has 54 total.

[Stephen23]

@Anonymous Matrix: no you do not have to type out each name again. I used the variable name a as an example. Use whatever variable you have been given, e.g.:

 name_of_your_variable(cellfun('length',name_of_your_variable)>3)

[Anonymous Matrix]

thanks!