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Suggestions - Windowed Zoom, Average Value Between Cursor
Posted: Wed Feb 17, 2010 2:32 pm
by jdm
I'm a new user to Dplot and generally work with 2D scatter and linear charts.
Suggestion 1 - A simple windowed zoom would be handy. Yes I know you can scroll with the mouse but sometimes I want the data displayed to be defined by a box that I draw around the data.
Suggestion 2 - It would be nice to have some simple statistics of data between two cursor points like simple average and standard deviation of the "y" values. Perhaps this could be added to the "distance between points" function.
jdm
Posted: Wed Feb 17, 2010 4:02 pm
by jsc
View > Zoom in in the menu, or click on the magnifying glass.
Info > List Peak Values or
Info > List Peak Values within a Range
I think it's covered.
Posted: Mon Mar 01, 2010 3:23 pm
by jdm
Thanks for the tips jsc. The "List Peak Values within a Range" is exactly what I was looking for.
Zooming and panning are still a bit quirky for me. Try this; create a 2D XYYY plot with variable on Y and an Independent Y2. Y range = 0-200. Y2 Range = 0-1000. My Y data is falls 0-40, my Y2 data is 180-240. I set the Y and Y2 range so that all the curves can be visible as I zoom in and the noise in the data is not so visible. Once I've zoomed in on the part of the chart I want to examine I can pan left,right,up and down using the arrow key or cntrl arrow for finer increments.
If I zoom in and use <cntrl> up and <cntrl> down, the y2 scale begins to change and my Y2 graph begins to flatten. If I do three up and three down repeated 5 times my new Y2 range is -900,000 to +1.2M. The Y range stays the same.
A bit strange...
jdm
Posted: Mon Mar 01, 2010 3:59 pm
by jsc
Yes, using the arrow keys with a Y2 axis are a bit quirky. The left and right arrows keys work okay for panning once zoomed in, but don't use the up and down because it messes up the display scaling. When I find an area that I'm interested in, I have to return to no zoom, then zoom back in with one selection. Then if I can pan only left and right, I'm in pretty good shape.