How to select the first letter of every word

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Krish Desai
Krish Desai 2015-12-5
评论： Krish Desai 2015-12-10
I have no idea how I would go about doing this
Input: I like eating pizza Output: Ilep

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Mohammad Abouali
Mohammad Abouali 2015-12-5
编辑：Mohammad Abouali 2015-12-5
str='I like eating pizza';
str2=cellfun(@(c) c(1),strsplit(str))
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Krish Desai
Krish Desai 2015-12-10
Also how would I be able to eliminate extra spaces? For instance if the input was ' I like eating pizza'?

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