Skip to main content

Topics

This section allows you to view all Topics made by this member. Note that you can only see Topics made in areas you currently have access to.

Topics - titan100

1
XCMS - Cookbook / XCMS peak integration visualization
Quote
Hi,
I have quick question on peak integration visualization using xcms. What function should I use to visualize the peak integration after peak picking, ret correction, and grouping? I am not sure if getEIC will help. I am looking for something like I have attached. I want to see how my preprocessing methods have worked. I have attached image as an example for reference.

Thank you for your time.




[attachment deleted by admin]
3
Mass spectrometers / QTRAP parameters for lipidomics
Hello,
I am planning to run human samples for lipidomics analysis. I am new to qtrap and using sciex qtrap 5500. Can anyone please help me telling the parameter settings used for your analysis? I thought this will help me to optimize parameters for my project.

Thank you  :) .
4
XCMS / XCMS plot error (How to fix it)
> #xset <- faahKO
> xset
An "xcmsSet" object with 12 samples

Time range: 2506.1-4147.7 seconds (41.8-69.1 minutes)
Mass range: 200.1-599.3338 m/z
Peaks: 4721 (about 393 per sample)
Peak Groups: 0
Sample classes: KO, WT

Peak picking was performed on MS1.
Profile settings: method = bin
                  step = 0.1

Memory usage: 0.713 MB
> xset <- group(xset)
262 325 387 450 512 575
> xset2 <- retcor(xset, family="symmetric", plottype="mdevden")
Retention Time Correction Groups: 133
Error in plot.new() : figure margins too large