How to get line number in a text file with a specific word

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Jaffrey Hudson Immanuel Jeyakumar 2019-6-22

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https://ww2.mathworks.cn/matlabcentral/answers/468384-how-to-get-line-number-in-a-text-file-with-a-specific-word

评论： Jaffrey Hudson Immanuel Jeyakumar 2019-7-17

采纳的回答： madhan ravi

Hallo,

I have a fruit.txt file with data as follows,

apple

mango

Cherry

Watermelon

I want to write a script whcih will find the word 'apple' and return me it line number.

Can anyone help me ?

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madhan ravi 2019-6-22

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https://ww2.mathworks.cn/matlabcentral/answers/468384-how-to-get-line-number-in-a-text-file-with-a-specific-word#answer_380343

编辑：madhan ravi 2019-6-22

在 MATLAB Online 中打开

No loops needed:

A = regexp(fileread('fruit.txt'),'\n','split');
whichline = find(contains(A,'apple'))

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Jaffrey Hudson Immanuel Jeyakumar 2019-6-22

Hallo Madhan,

Thanks for the answer. The script works very fine :)

Regards,

Jaffrey Hudson

Jaffrey Hudson Immanuel Jeyakumar 2019-7-17

Hallo ,

I need a small help. I have to trim from the second occurance of the search text 'SOF1_ANTIALIASING on surface AXLERIMI' . How can i update the script ?

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infinity 2019-6-22

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Hello,

you could try this

fileID = fopen('fruit.txt','r');
A = textscan(fileID,'%s');
fclose(fileID);
n = size(A{:});
for i = 1:n
    if strcmp(A{:}(i),'apple')
        linenumber = i;
    end
end

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Jaffrey Hudson Immanuel Jeyakumar 2019-6-22

编辑：madhan ravi 2019-6-22

在 MATLAB Online 中打开

Hallo Trung,

I get the following error.

Error using textscan
Invalid file identifier. Use fopen to generate a valid file identifier.
Error in linenumber4 (line 4)
A = textscan(fileID,'%s','delimiter',sprintf('\f'));