COVARIANCE ANALYSIS
This page explains the commands for covariance analysis. It can be performed when profiles from two techniques measured on the same samples are available. The matrix is formed so that the first dataset is put on the X axis, the second on the Y axis.
Commands for covariance analysis
Defines the type of matrix to be calculated.
0 covariance matrix (default)
1 correlation matrix
Defines two values of the Y variable around which two slices of the data matrix are plotted.
Defines two values of the X variable around which two slices of the data matrix are plotted.
datatype2, preprocess2, file2, range2, skiplines2, skipdata2
Commands for the second dataset. They have the same meaning of the corresponding command without the final "2". See here for their explanation.
Example:
whichanalysis 3
dataType 2
norm 1
file /home/rocco/prot/compmod/alpha/paper/PADv3/0.dat
file /home/rocco/prot/compmod/alpha/paper/PADv3/1.dat
file /home/rocco/prot/compmod/alpha/paper/PADv3/2.dat
dataType2 3
norm2 2
file2 /home/rocco/prot/compmod/alpha/paper/PADv1/0.dat
file2 /home/rocco/prot/compmod/alpha/paper/PADv1/1.dat
file2 /home/rocco/prot/compmod/alpha/paper/PADv1/2.dat
4 diffraction profiles are studied against 4 FT_IR spectra on the same samples. Diffraction and FT-IR spectra are normalized differently.
