Data Editing Scaling and Preprocessing

Data Editing, Scaling, and Preprocessing

preprocess - Selection and application of standard preprocessing structures.

preprouser - User-defined preprocessing methods.

editds - Editor for DataSet Objects.

Baselining and Offset Correction

baseline - Subtracts a polynomial baseline offset from spectra.

baselinew - Baseline using windowed polynomial filter.

wlsbaseline - Weighted least squares baseline function.

mscorr - Multiplicative scatter/signal correction (MSC).

savgol - Savitzky-Golay smoothing and differentiation.

lsq2top - Fits a polynomial to the top/(bottom) of data.

med2top - Fits a constant to top/(bottom) of data.

Derivatives and Smoothing

savgol - Savitzky-Golay smoothing and differentiation.

polyinterp - Polynomial interpolation, smoothing, and differentiation.

Sample-wise scaling corrections (Normalizing)

mscorr - Multiplicative scatter/signal correction (MSC).

normaliz - Normalize rows of matrix.

snv - Standard normal variate scaling.

Variable-wise scaling and offset corrections

auto - Autoscales matrix to mean zero unit variance.

mncn - Scale matrix to mean zero.

medcn - Median center scales matrix to median zero.

logdecay - Mean centers and variance scales a matrix using the log decay of the variable axis.

scale - Scales data using specified means and std. devs.

rescale - Scales data back to original scaling.

gscale - Group/block scaling for a single or multiple blocks.

gscaler - Applies group/block scaling to submatrices of a single matrix.

Interference Removal and Missing Data

glsw - Generalized least-squares weighting/preprocessing.

mdcheck - Missing Data Checker and infiller.

osccalc - Calculates orthogonal signal correction (OSC).

Sample and Variable handling

coadd - Reduce resolution through combination of adjacent variables or samples.

delsamps - Deletes samples (rows) or variables (columns) from data matrices.

excludemissing - Automatically exclude too-much missing data in a matrix.

lamsel - Determines indices of wavelength axes in specified ranges.

shuffle - Randomly re-orders matrix and multiple blocks rows.

specedit - GUI for selecting spectral regions on a plot.

unfoldm - Rearranges (unfolds) an augmented matrix to row vectors.

unfoldmw - Unfolds multiway arrays along specified order.

batchdigester - Parse wafer or batch data into MPCA or Summary PCA form.