# Time Series & Lookup Tables

## Models Illustrating the Use of Time Series and Lookup Tables

All the models assigned to the selected category are listed below.

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• #### Median Function

Methods to calculate the median of an array or time series are illustrated using Script elements and Function elements.

• #### Gauss-Newton Trend Line Fitting

This model illustrates how to fit a trend line to data using the Gauss-Newton method.

• #### Time Shifting a Time Series

The purpose of this model is to demonstrate time shifting historic data in a Time Series element. This type of model makes it easy to show summary statistics like exceedance probability of annual peak flow rate or mean annual flow rate.

• #### Time Series Shifting Options

This model includes 4 different methods of time shifting to be used in a wider array of applications.

• #### Time Series Element Lookup Functions

This model illustrates how you can reference a Time Series like a lookup function to access future or past values.

• #### Post-Process Time History Statistics

Example model which generates probabilistic time histories and post-processes time history statistics

• #### Pre-Processing Time Series Data

Uses SubModels to pre-process (and plot) historic time series data

• #### Lookup Table Import

This example shows how to import 1D, 2D and 3D Lookup Table data from text and Excel files.

• #### Time Series Element Examples

Examples illustrating basic Time Series element functionality

• #### Time Series Analysis

This model provides an example of calculating statistics for a data time series.

• #### Time History Statistics

This model provides examples of two different methods which can be used to generate statistics for time histories.

• #### Scatterplot

This model plots paired data for equivalent time intervals on the same scatterplot.

• #### Probability Mass Function (PMF)

This model creates a histogram from time series values and uses it to create a PMF of the data.

• #### Time Series Data Preprocessing

In this example, a SubModel is used to calculate average monthly rainfall amounts from a Time Series element containing rainfall rate data

• #### Spline Interpolation

This model implements a spline interpolation method to generate smoothly-varying dependent variable values from a 1-D Lookup Table.

• #### Reservoir with Operating Pools

Operating rules control outflows from a reservoir that contains operating zones divided into surcharge, flood control, conservation, and dead pool zones.