## On this page # Interface IOperationsFFTLineDataSeriesViewModel Last update: 09.03.2026 Namespace: [VM.Operations.Post.Interfaces](VM.Operations.Post.Interfaces.md) Assembly: VM.Operations.Post.dll Represents a view model for the fft line data series. ```csharp public interface IOperationsFFTLineDataSeriesViewModel ``` ## Examples For an example that includes information about interfaces, see this example. To view the examples, refer to the location of the 'Install\_Path\\Motion\\Document\\Postprocessor API for Python.zip' file. ```python # IOperationsFFTLineDataSeriesViewModel.py import sys # Get the current file's path and set the path for external modules. current_dir = __file__.rsplit('\\', 1)[0] external_modules_path = current_dir + '\\..\\..\\Modules' sys.path.append(external_modules_path) # Import necessary modules from OperationAPI import * # Start the headless application interface applicationHandler = ApplicationHandler() # Import result file result_file_path = get_result_file_path() # Set array about result file filepaths = List[str]() filepaths.Add(result_file_path) # Open about result files # This will open the result file in the application. # When the result is first opened, a Page is created and an Animation View is created on that Page. applicationHandler.AddDocument(filepaths) # Get Active Page # This retrieves the currently active page in the application. page = applicationHandler.GetActivePage() # Creating a Chart # Create a new Chart View on the page # This will create a new chart view with the specified name. chartView = page.CreateChart("Chart") # Set array about combination of characteristic and component curvePaths = List[str]() curvePaths.Add(r'Displacement/Magnitude') # Create a PlotParameters object to specify the parameters for the plot. # Set the Entity to Plot. # The Target is the name of the target for which you want to retrieve the curves. # Set the paths for the curves you want to retrieve. # This is where you specify the characteristics and components you want to plot. parameters = PlotParameters() parameters.Paths = curvePaths parameters.Target = "Crank" # Add Curves (FilePath, Curve Parameter) # FilePath - The path of the result to access. # parameters - The class used as a parameter of the AddCurve function. # The instance of the curve. curves = chartView.AddCurves(result_file_path, parameters) # Documentation Example # create_fft.py # SeriesNames - A list of curve names. # FFTType - Magnitude, Phase # FFTWindowType - Rectangular, Triangular, Bartlett, Hanning, Hamming, Welch, BlackMan, None # ScaleType - Original, Logarithm, Decibel # Points - The number of data point for FFT # Start - The start time for using FFT on target data series # End - The end time for using FFT on target data series ffts = chartView.CreateFFT(curves, FFTType.Magnitude, FFTWindowType.Rectangular, ScaleType.Original, 128, 0, 1.0) ffts[0].Start = 0.02 ffts[0].End = 1.0 ffts[0].FFTScaleType = ScaleType.Logarithm ffts[0].FFTType = FFTType.Phase ffts[0].FFTWindowType = FFTWindowType.Hanning ffts[0].SelectedPoints = 512 # Close the Pages page.Close() # Close the Document applicationHandler.CloseDocument(result_file_path) ``` ## Properties ### End Gets or sets the end time for using FFT on the target data series. ```csharp double End { get; set; } ``` #### Property Value double #### Examples For an example that includes this property, see the [Interface IOperationsFFTLineDataSeriesViewModel](VM.Operations.Post.Interfaces.IOperationsFFTLineDataSeriesViewModel.md). #### Remarks Use this property to specify or retrieve the end time for performing FFT on the target data series. ### FFTScaleType Gets or sets the scale type of FFT. ```csharp ScaleType FFTScaleType { get; set; } ``` #### Property Value ScaleType #### Examples For an example that includes this property, see the [Interface IOperationsFFTLineDataSeriesViewModel](VM.Operations.Post.Interfaces.IOperationsFFTLineDataSeriesViewModel.md). #### Remarks Use this property to specify or retrieve the scale type for FFT. The supported types are: - - - ### FFTType Gets or sets the type of FFT. ```csharp FFTType FFTType { get; set; } ``` #### Property Value FFTType #### Examples For an example that includes this property, see the [Interface IOperationsFFTLineDataSeriesViewModel](VM.Operations.Post.Interfaces.IOperationsFFTLineDataSeriesViewModel.md). #### Remarks Use this property to specify or retrieve the type of FFT. The supported types are: - - ### FFTWindowType Gets or sets the window type of FFT. ```csharp FFTWindowType FFTWindowType { get; set; } ``` #### Property Value FFTWindowType #### Examples For an example that includes this property, see the [Interface IOperationsFFTLineDataSeriesViewModel](VM.Operations.Post.Interfaces.IOperationsFFTLineDataSeriesViewModel.md). #### Remarks Use this property to specify or retrieve the window type for FFT. The supported types are: - - - - - - - - ### SelectedPoints Gets or sets the number of data points for FFT. ```csharp int SelectedPoints { get; set; } ``` #### Property Value int #### Examples For an example that includes this property, see the [Interface IOperationsFFTLineDataSeriesViewModel](VM.Operations.Post.Interfaces.IOperationsFFTLineDataSeriesViewModel.md). #### Remarks Use this property to specify or retrieve the number of data points to be used for FFT. ### Start Gets or sets the start time for using FFT on the target data series. ```csharp double Start { get; set; } ``` #### Property Value double #### Examples For an example that includes this property, see the [Interface IOperationsFFTLineDataSeriesViewModel](VM.Operations.Post.Interfaces.IOperationsFFTLineDataSeriesViewModel.md). #### Remarks Use this property to specify or retrieve the start time for performing FFT on the target data series.