Publications by jrcuesta
VIDEO: Working with ChemoSpec (HCA with the scores)
Related To leave a comment for the author, please follow the link and comment on their blog: NIR-Quimiometria. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job. Want to share your content on R-bloggers? click here i...
399 sym 2 img
"R" : Identifying peaks
The function “identify” from “R”, is very useful to check the spectrum for peaks or areas of interest. I use it here to see the wavelength with the highest variability in the Shootout-2012 Calibration Set. This wavelength has a high variability due to the changes in concentration of the Active component in the mixture.See the video to...
1347 sym 2 img
Standard Normal Variate (SNV: Other way)
This is another way to pre-treat aspectra set with the SNV math-treatment (Standard Normal Variate). You can see the other one in the post : “Standard Normal Variate (SNV)”.In this post, I use the R function “sweep“.library(ChemometricsWithR)#in a first step I calculate the average value#of all the data points for every spectrum and#sub...
1684 sym
Looking to boxplots (Shootout 2012)
Boxplots are a nice way to compare the three sample sets of the Shoot-out 2012 data files.There is a category variable (Set) in the data frame with the labels (Cal = Training Set, Test = Test Set and Val = Validation Set). # IMPORTING THE SAMPLE SETS #shootout2012.raw# ORGANIZING THE DATA-FRAME #NITActiveSetshootout2012+ NIT=I(NIT))names(shootout...
1173 sym R (370 sym/1 pcs) 2 img
Checking validation statistics (Monitor function 030220139)
Related To leave a comment for the author, please follow the link and comment on their blog: NIR-Quimiometria. R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job. Want to share your content on R-bloggers? click here i...
399 sym