Programmer Guide/Command Reference/EVAL/ipeak

ipeak

Search the function y for local peaks and return either a scalar or a vector with indexes of the peak values. The result can, for example, be passed directly to qinterp() for interpolation. This is a subcommand of the EVAL command.

Usage:

ipeak(y, npeaks, istart, iend, nwidth, ymin)

Parameters:

y

The data vector (the function).

npeaks

The maximum number of peaks. The default is 1.

istart

The index to start with. The default is 0.

iend

The index to end with. The default is y[1nrow]-1.

nwidth

The width of the peak (+/-). The default is 1.

ymin

The threshold (a scalar or a vector). By default there is no threshold.

Return Type:

scalar or vector