How do you search a file for a matching string?

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Vinay kumar Reddy
Hi,
I have a huge contacts list in a excel file which consists of following fields
FirstName LastName UserID EmailAddress.
I have FirstName and LastName in MATLAB as a variable.
How do I extract the user ID and EmailAddress for a corresponding FirstName and LastName?
Note:There are some 50,000 contacts in Excel file.

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Azzi Abdelmalek
Azzi Abdelmalek 2013-2-2
[num,text,v]=xlsread('yourfile')
s1='firstname';
s2='lastname';
idx=find(strcmp(v(:,1),s1) & strcmp(v(:,2),s2)
Id=v(idx,3)
Email=v(idx,4)

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