Re: How to deal with big matrix?
- To: mathgroup at smc.vnet.net
- Subject: [mg116637] Re: How to deal with big matrix?
- From: Oliver Ruebenkoenig <ruebenko at wolfram.com>
- Date: Tue, 22 Feb 2011 04:44:20 -0500 (EST)
On Mon, 21 Feb 2011, Szymon Roziewski wrote:
> Hello there,
>
> I have quite big matrix with let say 1000 rows and 1100 columns.
> Each of element of this matrix is a point on a surface e.g. {1.232,12.123}
> How can I quickly get first element of each point for whole matrix and put
> it in a vector (1000*1100 - this will be a length of that vector) without do
> it in a nested loop (Do[Do[...]])?
> And the similar to get the second element of each point into vector.
>
> kind regards,
> Szymon Roziewski
>
Hi Szymon,
does
data = RandomReal[{0, 1}, {3, 4, 2}]
data[[All, All, 1]]
and
Flatten[data[[All, All, 1]]]
work for you?
Oliver