What is a Mat with 0 rows used for?

#Mat
#cvMat

asked 2014-03-13 13:32:22 -0600

ytham
1 ●1

I see in some cases people are initializing a Mat with zero rows. i.e.:

Mat labels(0,1,CV32FC1);

This creates a labels Mat with 0 rows and 1 col. It doesn't look like it can store any data since it would have no 'cells', so to speak. How is this useful? Can this store data?

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answered 2014-03-16 19:28:55 -0600

ytham
1 ●1

So, these matrices are not for displaying objects. Instead, they are used in the case when you want to use the Mat as a container object and push data into it.