User`s guide

Importing, Viewing, and

Preprocessing Data

This chapter describes how to import, view, and preprocess data with the Curve Fitting Toolbox. You

import data with the Data GUI, and view data graphically as a scatter plot using the Curve Fitting

Tool. The main preprocessing steps are smoothing, and excluding and sectioning data. You smooth

data with the Data GUI, and exclude and section data with the Exclude GUI. The sections are as

follows.

Importing Data Sets

(p. 2-2)

Select workspace variables that compose the data set, list all imported

and generated data sets, and delete one or more data sets.

Viewing Data (p. 2-6) View the data graphically as a scatter plot.

Smoothing Data (p. 2-9) Reduce noise in a data set using moving average filtering, lowess or

robust lowess, loess or robust loess, or Savitzky-Golay filtering.

Excluding and Sectioning

Data (p. 2-25)

Mark individual data points (outliers) to be excluded from a fit, or mark

a range of data points (sectioning) to be excluded from a fit.

Additional Preprocessing

Steps (p. 2-40)

Additional preprocessing steps not available through the Data GUI,

such as transforming the response data and removing

Infs, NaNs, and

outliers from a data set.

Selected Bibliography

(p. 2-42)

Resources for additional information.