This is a development version of the SIMA documentation. You will find the official version at sima.sintef.no

Resample

The resample filter changes the sampling interval of a time series signal using linear interpolation. This is useful when combining signals recorded at different rates, when reducing data volume for long simulations, or when preparing signals for filters that require a specific time step.

1. Description

The input signal is resampled onto a new uniform time grid by linearly interpolating between existing sample points. This produces an equidistant output signal at the requested sampling interval.

The filter also supports an offset that shifts the start of the output time axis, effectively trimming the beginning of the time series. This is commonly used to remove transient start-up effects before further post-processing.

When multiple input signals have different sampling intervals, the Use Minimal Delta option automatically selects the smallest time step among the inputs as the new sampling interval, ensuring no loss of temporal resolution.

2. Fields

  • Use Minimal Delta: when enabled, the filter automatically uses the smallest sampling interval found among the input signals (s). This is convenient when merging signals from different sources with different time steps

When Use Minimal Delta is disabled:

  • New Sampling Interval: the desired constant time step for the resampled output signal (s)

  • Offset: shifts the start of the output time axis by the given amount (s). Use this to skip initial transients

3. Input

Any equidistant time series signal. See Signal Types.

4. Output

Resampled equidistant time series at the new sampling interval, starting from the specified offset.

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