backgroundstart

Computes the optimal point for starting the background fit

Warning

This is a legacy function. Its use is not recommended for routine or accurate data analysis.

Syntax

[t0,pos] = backgroundstart(V,t,bgmodel)
[t0,pos] = backgroundstart(___,'Property',Value)
Parameters
  • V - Signal (N-element array)
  • t - Time axis (N-element array)
  • bgmodel - Background model (function handle)
Returns
  • t0 - Optimal fitting start time (scalar)
  • pos - Optimal fitting start index (scalar)

Description

[t0,pos] = backgroundstart(V,t,bgmodel)

Returns the optimal start time t0 and corresponding array index pos at which to start fitting the background function corresponding to the background model given by model (such as @bg_hom3d etc - see full list of background models).

Additional Settings

Additional settings can be specified via name-value pairs. All property names are case insensitive and the property-value pairs can be passed in any order after the required input arguments have been passed.

[t0,pos]  = backgroundstart(___,'Property1',Value1,'Property2',Value2,___)
  • 'SearchStart' - Relative Search Start

    Time (in microseconds) at which the background search starts

    Default: 0.1*max(t)

    Example:

    [t0,pos] = backgroundstart(___,'RelSearchStart',1.5)
  • 'SearchEnd' - Relative Search End

    Time (in microseconds) at which the background search ends

    Default: 0.6*max(t)

    Example:

    [t0,pos] = backgroundstart(___,'RelSearchEnd',4)
  • 'EndCutOff' - Signal cutoff

    Time (in microseconds) after which the signal is no longer used for fitting By default the whole signal is evaluated.

    Default: max(t)

    Example:

    [t0,pos] = backgroundstart(___,'EndCutOff',6.5)

  • For further name-value pair options see fitbackground.