anyone can help me explain the meaning of the following code?

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Shwe
Shwe 2024-5-6
评论： Shwe 2024-5-6
Ran in:
data = [ 1 100 500; 2 200 600; 3 300 700; 4 400 800 ];
headers = {'ID', 'Population', 'Revenue'};
for i = 1:size(data, 1)
fprintf('%-4d %-12d %-10d\n', data(i, :));
end
1 100 500 2 200 600 3 300 700 4 400 800
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Torsten
Torsten 2024-5-6
编辑：Torsten 2024-5-6
It defines a loop over i where i runs from 1 to the number of rows of the matrix "data" (the "1" in size(data,1) refers to the first dimension of the matrix "data", thus the number of rows).
Since "data" has 4 rows, the loop runs from 1 to 4.
Shwe
Shwe 2024-5-6
'It defines a loop over i where i runs from 1 to the number of rows of the matrix "data" (the "1" in size(data,1) refers to the first dimension of the matrix "data", thus the number of rows).
Since "data" has 4 rows, the loop runs from 1 to 4.'
Dear Torsten,
Thank you for your explaination.
regards,

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the cyclist
the cyclist 2024-5-6
编辑：the cyclist 2024-5-6
I ran your code here. It seems pretty obvious what it does, right?
You might want to do the free online MATLAB Onramp tutorial, if you don't know what a for loop does. You could also read the documentation page for fprintf.
Perhaps the only tricky part is the exact explanation of the formatting strings such as
'%-4d'
That is explained in that documentation page, in the formatSpec section.

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