EstimatePeakSizes
EstimatePeakSizes [/B=baseWave ] [/X=xWave ] [/E=bothEdgesWave ] edgePct, maxWidth, box, npks, peakCentersWave, peakWave, peakAmplitudesWave, peakWidthsWave
The EstimatePeakSizes operation estimates the amplitudes and widths of peaks whose estimated centers are given.
The EstimatePeakSizes operation is used primarily by the Igor Technical Note #20 and its variants.
Parameters
edgePct is the percentage of peak height at which the edge is detected, relative to the baseline. It must be between 1 and 99, and is usually 50.
maxWidth is the maximum width that will be returned in peakWidthsWave, in X coordinates.
box is the number of peak values included in the sliding average when smoothing peakWave and baseWave. If you specify an even number, the next-higher odd number is used.
npks is the number of peaks whose sizes are to be estimated. It must be at least 1.
peakCentersWave must contain the point numbers of the centers of the peaks and have a length of at least npks. The peak sizes are estimated by starting the search for the peak edges from these peak centers. The i-th peak center must be stored in peakCentersWave[i] where i ranges from 0 to npks-1. The peak center values in peakCentersWave must be monotonically increasing or decreasing.
peakWave is the input wave containing the peaks.
peakAmplitudesWave is an output wave that will contain the baseline-corrected peak amplitudes of the peaks. It must have a length of at least npks. The i-th peak amplitude is stored in peakAmplitudesWave[i].
peakWidthsWave is an output wave that will contain the widths of the peaks in X coordinates. It must have a length of at least npks. The i-th peak width is stored in peakWidthsWave[i].
Flags
| /B=baseWave | baseWave is subtracted from peakWave to compute the derived data which is searched for edges. It must be the same length as peakWave. | |
| /E=bothEdgesWave | bothEdgesWave specifies an already-existing output wave. It must have a length of at least npks*2. The point coordinates of the i-th peak edges are stored in bothEdgesWave[i*2] and bothEdgesWave[i*2+1]. | |
| If the X values increase with point number, bothEdgesWave[i*2] will be greater than bothEdgesWave[i*2+1], which may defy expectations. | ||
| /X=xWave | xWave supplies the X coordinates for the corresponding points in peakWave and baseWave. It must be of the same length as peakWave and must be monotonically increasing or decreasing. | |