[Numpy-discussion] Resize method

Christopher Barker Chris.Barker at noaa.gov
Mon Nov 23 20:04:56 EST 2009

Colin J. Williams wrote:
> Thanks for this.  My aim is to extract a row of data from a line in a 
> file and append it to an array.  The number of columns is fixed but, at 
> the start, the number of rows is unknown.

That is exactly the kind of use-case I had in mind.

In fact, you can use it now if you use a custom dtype to hold your row 
of data, rather than using a 2-d array.

> I think that I have sorted out the resize approach but I need more tests 
> before I share it.

Please do, and consider adding to and/or making suggestions to 
accumulator -- why should we all re-invent this wheel?

To be far, you can do what you need by accumulating in a python list, 
then making an array out of it when you are done -- and it will probably 
be faster, but *may* take more memory.


Christopher Barker, Ph.D.

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