Localmax

Purpose

Automated identification of local maxima

Synopsis

i0 = localmax(x,w)

Description

Finds maxima in windows of width (w). Wider windowing is used to avoid local maxima that might be due to noise. The default window width is w=3. This function is called by PEAKFIND.

Inputs

• x = matrix of measured traces containing peaks each row of (x) is an individual trace.

Optional Inputs

• w = odd scalar window width for determining local maxima {default: w = 3}.

Outputs

• i0 = cell w/ indices of the location of the major peaks for each of the traces in each cell.

Examples

load nir_data

plot(spec1.axisscale{2},spec1.data(1,:))

i0 = localmax(spec1.data(1,:));

vline(spec1.axisscale{2}(i0{1}))

i0 = localmax(spec1.data(1,:),5);

vline(spec1.axisscale{2}(i0{1}),'r')

See Also

fitpeaks, peakfind