[Kst] How do I subset data?

[Barth Netterfield]

Hi John,

Fitting to subsets is, alas, on our list of high priority features to add... 
(the 'alas' part here means that it isn't done yet....)

For now, what you would have to do is to load a subset of the data.  You can 
do this when you first load the data (from the command line or the data 
wizard) or you can change the frame range of all of your data using the 
change frame range icon in the tool-bar.  I understand that this can be 
pretty inconvenient if you don't know exactly what sample numbers you want.

sigh...
cbn

On Tuesday 23 May 2006 07:46, John S.Walker wrote:
> G'day,
>
> I'm new to kst so this may be a naive question,
>
> I'm  trying to use kst to browse and analyse my data. The data consists
> of traces of muscle force responses to chemical and mechanical
> interventions an is about 100 000 data points in length. In several
> portions of the record, there is a state transition with an an
> exponential rise/decay to the new state. I'd like to be able to isolate
> that portion of the record (say by drawing a box around it) and
> applying a curve fit to the selected protion of the record; this may
> involve re-zeroing the x-axis (substracting the first x-value from all
> x-values in the subset) or alternatively inserting an offset into the
> equation (i.e. y=a + b*exp(c*(x-d)) where d is the offset). Can this
> sort of analysis be performed with kst?  I had a quick try at
> subsetting data but couldn't figure it out and the fits seem to be
> global. Any hints?
>
>
>
> John S. Walker, PhD
> Department of Physiology & Biophysics
> University of Illinois at Chicago
> 835 Sth Wolcott Ave MC 901
> Chicago IL 60612
> USA
>
> email: jsw9c at uic.edu
> phone: 1 312 355 0150
> fax: 1 312 355 0261
>
> Please avoid sending me Word or PowerPoint attachments.
> See http://www.fsf.org/philosophy/no-word-attachments.html
>
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