Dispmat

Purpose

Calculates the dispersion matrix of two spectral data sets.

Synopsis

[c,meansx,meansy,stdsx,stdsy] = dispmat(x,y,options);

Description

Calculates a dispersion matrix, as defined by the options, of datasets x and y. INPUTS:

• x : (2-way array class "double" or "dataset") x-matrix for dispersion matrix.
• y : (2-way array class "double" or "dataset") y-matrix for dispersion matrix.

OUTPUTS:

• c : dispersion matrix, as defined by options.
• meansx : mean of x.
• meansy : mean of y.
• stdsx : standard deviation of x.
• stdsy : standard deviation of y.

Options

• offsetx : [0] offset for x.
• offsety : [0] offset for y.
• dispersion : [1] dispersion matrix calculated:
• 1: standardized, offset corrected
• 2: length sqrt(nrows), offset corrected
• 3: purity about mean, offset corrected
• 4: purity about origin, offset corrected
• 5: asynchronous, offset corrected

See Also

corrspec, corrspecengine, purity