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Function Synopsis

xAxis = makeAxis (sampInt, numPoints, axisType)

Help text

 MAKEAXIS  Make 'correct' x-axis for plotting time or frequency data.
   This function will take a sampling interval and generate a true
   horizontal axis for use in plotting data.  SAMPINT is the 
   sampling interval between data points being plotted.  NUMPOINTS is the
   number of data points that are being plotted.  AXIS_TYPE
   is a (character) flag.  If set to 'f' it creates a frequency axis
   (to be used when plotting Fourier transforms).  If set to 't', it will
   make a time axis to plot the time-domain signal (this is the default).
   It returns a COLUMN vector.

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