[Rivet] Two-dimensional histograms

[James Monk]

I just re-discovered this (brief) thread because I want to do the same  
thing now.  For people in the future doing the same I point out here  
that there is the BinnedHistogram<T> object, which is a more  
convenient way of storing multiple one-dim histograms (that's the  
idea, anyway!).  With that you should be able to do

	myBinnedHistogram.fill(x, y, weight);

It is not really a two-dim histogram, since you have to populate it  
with a set of 1-dim histos (which is easy enough to do), but it's  
better then nothing.

cheers, and sorry I didn't think of this until I had the same issue!

James

On 25 Aug 2009, at 11:49, Andy Buckley wrote:

> Holger Schulz wrote:
>> Hi,
>>
>> do we have two-dimensional histograms in Rivet?
>> I  need them for data storage reasons only.
>> I want to fill a profile histo with its contents.
>
> Afraid not! You might have to roll your own from  
> vector<vector<double> >
> or similar... if you do so, please put an e.g. "/// @todo Replace with
> proper 2D histo" comment in the code so we know to clean it up  
> later. Of
> course, if you fancy implementing a 2D histo in YODA... ;)
>
> Andy
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