Read fixed number of numbers from text file

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Brahim Aboumouadine
评论： Brahim Aboumouadine 2021-1-5
i have this matrix bellow save in a text file called test.txt
1 2 3 ...... ......100
101 102 ...... ..200
...........................
901 902 .......1000
i want to read only the first 500 numbers from it . how to do it ?
thanks in advance

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Jeremy Hughes
Jeremy Hughes 2021-1-5
编辑：Jeremy Hughes 2021-1-5
I assume the dots are meant as ellipses and not literally dots in the file. If so, you can use textscan pretty effectively here.
fid = fopen(filename);
d = textscan(fid,'%f',500);
d = d{1};
fclose(fid);
And if there are literally dots,
d = textscan(fid,'%f',500,'Whitespace',' .');

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