# External Functions

List of external functions.

List of external functions.

**barchart (bar)**

Creates a bar chart representation of selected data.**besselfilteranalog**

Applies the analog Bessel filter on the input signal.**besselfilterdigital**

Applies a digital Bessel filter on the input signal.**butterworth (bwfilt)**

Filters data forward and backward using a second order Butterworth algorithm.**clip**

The 3ms criterion commonly used to measure potential for chest injury.**clip_continuous**

The 3ms criterion commonly used to measure potential for chest injury.**clip_cumulative**

The 3ms criterion commonly used to measure potential for chest injury.**duration**

Calculates the cumulative duration for response values, given the X and Y input data vectors. The duration will be partitioned into 100 segments.**fir100**

Performs 100 Hz finite impulse response filtering of a digitized time series.**fuse**

Removes overlaps in curves.**hic**

The Head Injury Criterion commonly used to measure potential for head injury.**hicd**

Modified Head Injury Criterion for use with the free-motion head form.**histogram**

Creates a simplified histogram representation of selected data.**iso6487**

SAE J211/1 revision MAR95 filter with ISO 6487 compliant mirroring applied.**kth**

nee-thigh-hip injury function.**levelcrossing**

Signal processing tool that extracts equivalent constant amplitude fatigue cycles from a time series of load or strain data.**nij**

Calculate the Neck Injury Criteria.**rainflow**

Reduces the number of vector points from the test data without losing the damage, magnitude, and/or effect of the test data.**rangepair**

Reduces the number of vector points from the test data without losing the damage, magnitude, and/or effect of the test data.**saefilt95**

SAE J211/1 revision MAR95 compliant filter.**th_bandpass_butter**

Four-pole Butterworth filter.**th_butter**

Four-pole Butterworth filter.**th_cfc**

Channel Frequency Class filter.**th_fir100**

Fir100 filter.**th_four**

Low Pass fourier filter.**th_sae**

SAE class filter.**th_tche**

Tchebychev class filter.**timeatlevel**

Signal processing tool that indicates how long the signal spends at a given magnitude.**Effects of Sampling Interval and Signal Length**

Since the Nyquist frequency is half the sampling frequency, a higher sampling frequency will yield a spectrum in a wider frequency band.