I have a csv file, which contains some 0 and some non-zero values. How to get the index of the non-zero values in the csv file?

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Kiruthiga Sekar
Kiruthiga Sekar 2019-4-16
评论： the cyclist 2019-4-16
Please find the attached file. How to get the index of a non-zero value in the csv file, like i need to get [4 7] in an array, as it has the non-zero values. TIA

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the cyclist
the cyclist 2019-4-16
data = csvread('Book4.csv');
idx = find(data);
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