In this video I show I to prepare a spectrum to import later into ChemoSpec:The software I use gives the option to export the spectrum as a TXT file.This file is open with Excel and saved as CSV, to import later with others into ChemoSpec.
Blog Archives
Olive Oil NIR/VIS Spectra – 001 (ChemSpec)
I continue with the practicing with ChemSpec, and this time I import seven spectra of olive oil. This time I have been more careful and I have the frequency column as numeric form the CSV file. Once I have the spectra (with and offset):Take in account ...
My first "ChemoSpec" spectra
I’ve been this week trying to import some spectra to ChemoSpec (R Package), at the beginning I had problems generating the “csv” files, and the function getManyCsv did not recognize the files. I did not have properly configured the regional...
Should I adjust the slope?
I add a new video “Should I adjust the slope”, where a new part of script is added to the monitor function. I don´t recommend adjusting the slope, but there are circumstances where it is necessary:Suppose you have an equation, but not the ca...
F-test to find UECLs
I have fixed the link to the video "Removing Y outliers from the validation set" and it´s time to see what could be the next step to the function. As we know the RMSEP is the sum of the explained (BIAS) and unexplained error (SEP). We get also the SEP...
Removing "Y" outliers from the "Validation Set"
This is a new video about how to monitor and interpret statistics and graphics for validation. Removing "Y" outliers from Validation SetPrevious videos about the Monitor function for validation:Should I adjust the Bias?Monitor: Adding "RER" and "...
Exporting from Win ISI / Importing into R
Chemometric software´s have the option to export a matrix to a TXT file (in this case a constituents matrix), in a way we can import it easily into R, to work with. It is the first step to go into the R world.I use in this case Win ISI Soft...
Mahalanobis distance with "R" (Exercice)
I have developed this exercise with Excel in another post for the same calculations , I am going to develop it this time with "R". edad long. peso mg.kg1 28 &n...
Monitor: Adding "RER" and "RPD" statistics
I continue developing the Monitor function in R. The idea is to get statistics which help me to understand the performance of my model.Of course the validation set must be free of outliers (X or Y).I add this time two new statistics: RER and ...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
