MATLAB黑洞变量 [英] MATLAB black hole variable

问题描述

MATLAB是否有黑洞"或丢弃变量?

Does MATLAB have a "blackhole" or discard variable?

说我正在做类似的事情:

Say I'm doing something like:

[ rows cols ] = size( A ) ;

但是我不希望存储行.是否有一个黑洞"变量，我可以在其中发送值以使其消失?

But I don't want rows to be stored. Is there a "black hole" variable where I can send values to die?

所以分配就像

[ BLACKHOLE, cols ] = size( A ) ;

BLACKHOLE意味着丢弃该值并且不为其创建变量.

Where BLACKHOLE means throw the value away and don't create a variable for it.

推荐答案

对于2009b或更高版本，使用代字号〜"

For 2009b or later, there is the tilde sign "~"

[~,cols] = size(A);

或者，根据您的具体情况

Alternatively, in your specific case

cols = size(A,2);

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