Exact string match to confirm the string existence in the file

Hi all,

Could you find the exact string match in the input file?

I am unable get exact match of the sting in the read file, i tried this using strfind command, but could not get what i want.

My case is as follows,

Input file has data, out of it I need to find specific exact string in the file, suppose my input file name is input_data.txt and the data

>> txt = fileread('input_data.txt')
>> txt =  

    'var_abc = 12;
     var_abcd = 20;
     var_xyz = 30;
     var_xy = 152;
     var_abcxyz = 142;'

In this data i need to confirm specific string is present or not in the file.

Suppose i want to search the string var_ab in the file it's giving me

strfind(t, 'var_ab')
ans =

     1    16    62

but it is finding strings within other strings, here I need to search only exact specific string var_ab

If the specificr string is present in the file, it should return true/value/string else an empty/false output

i.e

strfind(t, 'var_ab')

ans =

     []

-Thanks

Answer 1

[Stephen23]

>> txt = fileread('input_data.txt');
>> spl = regexp(txt,'\w+','match');
>> any(strcmp('var_ab',spl(1:2:end)))
ans = 0
>> any(strcmp('var_abc',spl(1:2:end)))
ans = 1

[Bhaskar R]

Perfect !!

Thank you sir

Answer 2

[Shunichi Kusano]

Hi Bhaskar,

how about including space in the reference string? For your case, 'var_ab ', not 'var_ab'.

I wonder if I could catch your point.

HTH.

[Bhaskar R]

Yes, it may include but i used string trim. Stephen Cobeldick's answer helped.

Thanks for the reply.