From: Rob Biedenharn <Rob@...>
Date: 2008-06-24T06:46:49+09:00
Subject: Re: date intervals for graphs

On Jun 23, 2008, at 3:24 PM, Marcelo Barbudas wrote:

> Hi,
>
> I'm in a position where I have to create dynamic date based Line  
> graphs. By dynamic I mean the start and end dates are variable and  
> the output should depend on the time period.
>
> For example if the date interval is 7 days I would have to display 7  
> points of data. If the date interval is 100 days I would have to  
> display it by months since 100 points of data would be too much. It  
> has to be grouped somehow.
>
> Is there a library that does this automatically?
>
> If not, what would be the best solution for such a problem?
>
> I was thinking making 1 data point = 1 day. Then arbitrarily choose  
> that I want to display a max amount of 15 points per graph. Get the  
> data for those 15 points and plot the graph according to that.
>
> What problems could appear with this version?
>
> -- 
> M.
>


gruff or GoogleCharts, perhaps?

The grouping part (and the criteria for going from discrete to  
"grouped" points) would be up to you.

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com