Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


Math Forum
»
Discussions
»
sci.math.*
»
sci.stat.math
Notice: We are no longer accepting new posts, but the forums will continue to be readable.
Topic:
How to calculate max/min scales on a scatter plot
Replies:
1
Last Post:
Mar 25, 2014 4:35 PM




How to calculate max/min scales on a scatter plot
Posted:
Mar 25, 2014 1:15 AM


Good morning!
I have 3 log scatter plots that I want to establish smooth maximum and minimum lines. What is the usual mathematical method to do that? (Image and excel file links below.)
The black lines on the scatter plot images are hand drawn. The third scatter plot is especially tricky and not amenable to a moving average plus stddev because of the data clumping. Note: This is time series data so new data constantly comes in. In other words, I cannot just use the whole data population in one shot.
Any ideas would be greatly appreciated.
Excel File: https://dl.dropboxusercontent.com/u/44057708/Three%20Scatters.xls Image at: https://dl.dropboxusercontent.com/u/44057708/ThreeScatters.jpg



