snrthresh & chromatogram cropping

Topic: snrthresh & chromatogram cropping (Read 5270 times) previous topic - next topic

snrthresh & chromatogram cropping

July 08, 2011, 10:22:05 AM

Hi,

First time poster here! I have two questions about XCMS online. :?:

First, is it possible to adjust the signal-to-noise threshold with XCMS online?

Is it possible for me to crop sections of the chromatogram so that signals from unwanted regions will not be tabulated?, e.g. first minute and column wash out.

Thanks,

Kraig Worrall
Agriculture and Agri-foods Canada

Re: snrthresh & chromatogram cropping

Reply #1 – July 08, 2011, 11:25:34 AM

I figured out snrthresh. I missed the "advanced options" the first time through. :roll:

Re: snrthresh & chromatogram cropping

Reply #2 – July 09, 2011, 03:56:21 PM

It is not possible at the moment to filter out a retention time range prior to processing.
But this option could be added.

However, you can filter out unwanted features from the result table using the filter/search tool (click the magnifying glass).

Ralf.

Re: snrthresh & chromatogram cropping

Reply #3 – July 12, 2011, 08:45:53 AM

Thanks Ralf...