removeElement - Remove element from Simulink.SimulationData.Dataset

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Main Content

Remove element from Simulink.SimulationData.Dataset object

Syntax

Description

Examples

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Open the model LogDataDatasetFormat. The model logs the data generated by three source blocks using the Dataset format.

open_system("LogDataDatasetFormat.slx");

Simulate the model.

out = sim("LogDataDatasetFormat.slx");

By default, all logged data is returned in a single variable in the workspace as a Simulink.SimulationOutput object.

out = Simulink.SimulationOutput:

               tout: [101x1 double] 
               yout: [1x1 Simulink.SimulationData.Dataset] 

 SimulationMetadata: [1x1 Simulink.SimulationMetadata] 
       ErrorMessage: [0x0 char]

Check the contents of the Simulink.SimulationData.Dataset object, yout, that contains the logged output data.

yout = Simulink.SimulationData.Dataset 'yout' with 3 elements

                     Name         BlockPath                 
                     ___________  _________________________ 
1  [1x1 Signal]      Sine Wave    LogDataDatasetFormat/Out1
2  [1x1 Signal]      Pulse        LogDataDatasetFormat/Out2
3  [1x1 Signal]      White Noise  LogDataDatasetFormat/Out3

Use braces { } to access, modify, or add elements using index.

Suppose you want to use the logged outputs as input for another simulation that does not use the White Noise signal. To create a Dataset object that you can load as external input data for that simulation, remove the White Noise signal from the Dataset object yout. The White Noise signal is the third signal in the Dataset object, so specify the index as 3. Then, rename the Dataset object with the input data.

inputData = removeElement(yout,3); inputData.Name = "Input Data"; inputData

inputData = Simulink.SimulationData.Dataset 'Input Data' with 2 elements

                     Name       BlockPath                 
                     _________  _________________________ 
1  [1x1 Signal]      Sine Wave  LogDataDatasetFormat/Out1
2  [1x1 Signal]      Pulse      LogDataDatasetFormat/Out2

Use braces { } to access, modify, or add elements using index.

The value of the variable yout remains unchanged. To modify the value of the variable yout, assign the return from the removeElement function back to yout.

yout = removeElement(yout,3)

yout = Simulink.SimulationData.Dataset 'yout' with 2 elements

                     Name       BlockPath                 
                     _________  _________________________ 
1  [1x1 Signal]      Sine Wave  LogDataDatasetFormat/Out1
2  [1x1 Signal]      Pulse      LogDataDatasetFormat/Out2

Use braces { } to access, modify, or add elements using index.

The original Dataset object in the SimulationOutput object remains unchanged. To modify the data in the SimulationOutput object, access the Dataset object through the SimulationOutput object instead of assigning it to a separate variable.

out.yout = removeElement(out.yout,3); out.yout

ans = Simulink.SimulationData.Dataset 'yout' with 2 elements

                     Name       BlockPath                 
                     _________  _________________________ 
1  [1x1 Signal]      Sine Wave  LogDataDatasetFormat/Out1
2  [1x1 Signal]      Pulse      LogDataDatasetFormat/Out2

Use braces { } to access, modify, or add elements using index.

Input Arguments

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Index of element to remove from data set, specified as a scalar or a vector. To remove more than one element from the data set, specify a vector that contains the index for each element you want to remove.

Example: 1

Example: [1 3]

Output Arguments

Version History

Introduced in R2011a