# Blog Archives

## Checking validation statistics (Monitor function 030220139)

February 3, 2013
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(This article was first published on NIR-Quimiometria, and kindly contributed to R-bloggers) 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 on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

## Looking to boxplots (Shootout 2012)

January 20, 2013
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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 #...

## Standard Normal Variate (SNV: Other way)

January 1, 2013
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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...

## "R" : Identifying peaks

December 13, 2012
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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 variabi...

## VIDEO: Working with ChemoSpec (HCA with the scores)

December 2, 2012
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(This article was first published on NIR-Quimiometria, and kindly contributed to R-bloggers) 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 on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

## Shootout 2012 : first PLS regressions

November 23, 2012
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It´s time to start developing some regressions in order to find the best math treatment, the best number of terms, the best spectral regions, the best regression method,....This time I´m working with the PLS  package in R, and just to make ...

## VIDEO: Looking to the regression coefficients in R

November 16, 2012
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(This article was first published on NIR-Quimiometria, and kindly contributed to R-bloggers) 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 on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

November 14, 2012
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(This article was first published on NIR-Quimiometria, and kindly contributed to R-bloggers) 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 on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

## "Sample Sets" plots (Shootout-2012)

November 11, 2012
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Histograms of all the sample sets together and individuallyRaw SpectraSpectra treated with MSC (Multiple Scatter correction)Spectra treated with SG filters﻿

## Shootout 2012: Test & Val Sets proyections

November 7, 2012
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It is obvious (after seeing the spectra of the calibration set), that we have at least three clusters, and that this can be related with the concentration of the active ingredient in the tablets. If we see the scores in the PC1-PC2 score map we will se...