Mixed signal graph with scroll buffer

Hi,
I am sort of new to LV and trying to achieve  a mixed signal graph with a scroll back history my main problem is with what method to approach this
as graph doesn’t have history I need to add a history buffer of some sort but how do I have the graph show the desired range from that buffer
would it be more correctly to have a TDMS file saved and that the graph will do a X ms refresh to show the data
how much data can I put on a graph and were do I control it from - meaning is there some limitation of the number of points a graph shows ?
if so is there a way to say that if the full range I want to display is bigger then X time have the data shown be down sampled
I would appreciate if you can point me to reading material and or have a detailed example
thanks,
Assaf

Or, if the chart doesn't show what you need, you can save your data in a shift register or periodically in a file and call back a range into a (second) graph when needed.
Cameron
To err is human, but to really foul it up requires a computer.
The optimist believes we are in the best of all possible worlds - the pessimist fears this is true.
Profanity is the one language all programmers know best.
An expert is someone who has made all the possible mistakes.
To learn something about LabVIEW at no extra cost, work the online LabVIEW tutorial(s):
LabVIEW Unit 1 - Getting Started
Learn to Use LabVIEW with MyDAQ

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    To err is human, but to really foul it up requires a computer.
    The optimist believes we are in the best of all possible worlds - the pessimist fears this is true.
    Profanity is the one language all programmers know best.
    An expert is someone who has made all the possible mistakes.
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