Returns the selected parameter of the first signal in a waveform.


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Dialog Box Options

Option Description
Statistical Calculations Contains the following options:
  • Arithmetic mean—

    Calculates the mean, or average, of the values in Signals.

  • Median—

    Finds the median value in Signals. The Express VI sorts the values in Signals and selects the middle element of the sorted values.

  • Mode—

    Finds the value that occurs most often in the values in Signals.

  • Sum of values—

    Calculates the value of the sum of all the values in Signals.

  • Root mean square (RMS)—

    Calculates the RMS of the values in Signals.

  • Standard deviation—

    Calculates the standard deviation of the values in Signals.

  • Variance—

    Calculates the calculated variance of the values in Signals.

  • Kurtosis—

    Calculates the kurtosis of the values in Signals. Kurtosis is a measure of peakedness and is a normalized form of the fourth-order moment about the mean.

    Kurtosis is indicated by the following formula:

    Kurtosis = Fourth Moment/σ4

  • Skewness—

    Calculates the skewness of the values in Signals. Skewness is a measure of symmetry and is a normalized form of the third-order moment about the mean.

    Skewness is indicated by the following formula:

    Skewness = Third Moment/σ3
Extreme Values Contains the following options:
  • Maximum—

    Finds the highest point in a set of values in Signals.

  • Time of maximum—

    Finds the time of the highest point in a set of values in Signals.

  • Index of maximum—

    Finds the index value of the highest point in a set of values in Signals.

  • Minimum—

    Finds the lowest point in a set of values in Signals.

  • Time of minimum—

    Finds the time of the lowest point in a set of values in Signals.

  • Index of minimum—

    Finds the index value of the lowest point in a set of values in Signals.

  • Range (maximum - minimum)—

    Finds the value of the range from the lowest point to the highest point in a set of values in Signals.

  • First time—

    Finds the first time value in a set of values in Signals.

  • Last time—

    Finds the last time value in a set of values in Signals.

  • First value—

    Finds the first value in a set of values in Signals.

  • Last value—

    Finds the last value in a set of values in Signals.
Sampling Characteristics Contains the following options:
  • Total number of samples—

    Bases the calculation on the total number of samples in Signals.

  • Time between samples (dt)—

    Bases the calculation on the time between samples in Signals.
Input Signal

Displays the input signal.

If you wire data to the Express VI and run it, Input Signal displays real data. If you close and reopen the Express VI, Input Signal displays sample data until you run the Express VI again.
Results

Displays the measurements you configured this Express VI to perform and the calculated values of those measurements. You can click any measurement listed in the Measurement column, and the corresponding value or plot appears in the Result Preview graph.

Inputs/Outputs

  • cexpdynwdt.png Signals —

    Contains the input signal or signals.

  • cerrcodeclst.png error in (no error) —

    Describes error conditions that occur before this node runs.

  • ierrcodeclst.png error out —

    Contains error information. This output provides standard error out functionality.

  • iexpdynwdt.png Minimum —

    Returns the lowest point in a set of values in Signals.

  • iexpdynwdt.png Range —

    Returns the value of the range from the lowest point to the highest point in a set of values in Signals.

  • iexpdynwdt.png First Value —

    Returns the first value in Signals.

  • iexpdynwdt.png Last Value —

    Returns the last value in Signals.

  • iexpdynwdt.png Arithmetic Mean —

    Returns the mean, or average, of the values in Signals.

  • iexpdynwdt.png Standard Dev —

    Returns the standard deviation of the values in Signals.

  • iexpdynwdt.png Median —

    Returns the median value in Signals. The Express VI sorts the values in Signals and selecting the middle element of the sorted values.

  • iexpdynwdt.png Index of Min —

    Returns the index value of the lowest point of the values in Signals.

  • iexpdynwdt.png Summation —

    Returns the value of the sum of all the values in Signals.

  • iexpdynwdt.png Kurtosis —

    Returns the kurtosis of the values in Signals. Kurtosis is a measure of peakedness and corresponds to the fourth-order moment about the mean.

  • iexpdynwdt.png Time of Maximum —

    Returns the time of the highest point of the values in Signals.

  • iexpdynwdt.png Time of Minimum —

    Returns the time of the lowest point of the values in Signals.

  • iexpdynwdt.png Last Time —

    Returns the last time value in Signals.

  • iexpdynwdt.png RMS —

    Returns the calculated RMS of the values in Signals.

  • iexpdynwdt.png Mode —

    Returns the value that occurs most often in the set values in Signals.

  • iexpdynwdt.png Total Samples —

    Returns the total number of samples in Signals.

  • iexpdynwdt.png Maximum —

    Returns the highest point in a set of values in Signals.

  • iexpdynwdt.png Time Delta —

    Returns the time between samples in Signals.

  • iexpdynwdt.png Index of Max —

    Returns the index value of the highest point of the values in Signals.

  • iexpdynwdt.png First Time —

    Returns the first time value in Signals.

  • iexpdynwdt.png Variance —

    Returns the calculated variance of the values in Signals.

  • iexpdynwdt.png Skewness —

    Returns the skewness of the values in Signals. Skewness is a measure of symmetry and corresponds to the third-order moment about the mean.

    • Examples

    Refer to the following example files included with LabVIEW.

    • labview\examples\Express VIs\Express VI - Statistics.vi