what is meaning of this plzz tell me
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feat=[]; class=[];
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Star Strider
2018 年 3 月 21 日
Those assignments set the ‘feat’ and ‘class’ variables to empty arrays [].
Note that class (link) is a MATLAB function, and assigning a variable the same name ‘overshadows’ it. This will cause problems later if you want to use the class function.
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Walter Roberson
2018 年 3 月 21 日
When you assign [] to an entire variable, it assigns a double precision value that is 0 rows by 0 columns -- the empty double precision array.
When you assign [] to an indexed variable, such as feat(3,:) = [], then the meaning is quite different: it means to delete the indicated portion of the variable.
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