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

2017 2 15
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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?

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Stephen23
Stephen23 2017-2-15

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

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Anonymous Matrix
Anonymous Matrix 2017-2-15
编辑：Anonymous Matrix 2017-2-15
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
Stephen23 2017-2-15
编辑：Stephen23 2017-2-15
@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)

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