Xy graph: visible points after zoom

[_Faust]

Hi,

I've been struggling with getting the visible points of a XY graph visible in a table. The user can zoom, hence making the range smaller.

I've been using the x-range property nodes to determine the min and max axis value. But these values are usually a bit lower and higher than the first and last displayed point.

So when I search my array to find the index of the first and last datapoint using the range value, it usually returns -1

So who could help me out? The array contains timestamps 

[F._Schubert]

You can use the array threshold function to get the 'points'.

Most propably it won't work on the raw data, so you need to sort them. You could make a cluster (x,y,index) and sort it -> threashold with the x min,max values; use (y,x,index) and sort it ->  threashold with the y min, max values. Then get both subset's and use a for loop over one of them and search if the index is also in the index list of the other (>=0), if so, this is a displayed point.

Felix 

[_Faust]

Thank you! I will try right away. Kudos for you for the helpful and fast reply

[_Faust]

Message Edited by _Faust on 04-06-2010 07:43 AM