speaq (version 1.2.0)

findShiftStepFFT: Finding the shift-step by using Fast Fourier Transform cross-correlation

Description

This function uses Fast Fourier Transform cross-correlation to find out the shift step between two spectra.

Usage

findShiftStepFFT(refSpec,
        tarSpec,
        maxShift = 0)

Arguments

refSpec

The reference spectrum.

tarSpec

The target spectrum which needs to be aligned.

maxShift

The maximum number of points for a shift step. If this value is zero, the algorithm will check on the whole length of the spectra.

Value

• corValue
  The best correlation value
• stepAdj
  The shift step found by the algorithm

Details

Finding the shift-step by using Fast Fourier Transform cross-correlation

See Also

hClustAlign

Examples

res=makeSimulatedData();
X=res$data;
groupLabel=res$label;


maxShift=50;
refSpec=X[1,];
tarSpec=X[2,];
adj=findShiftStepFFT(refSpec, tarSpec,maxShift=maxShift);