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Application Note 11

Exchanging Data Files between SIGNAL and

MATLAB

Applies to: SIGNAL & RTS

Introduction

The MATLAB

program from The MathWorks (Natick, MA) is a programmable

mathematical analysis and display language which provides a broad range of capabilities for

mathematical modeling and signal analysis in a language environment similar to SIGNAL's.

For the user willing to program, MATALB can add powerful capabilities to the SIGNAL

environment – for example, extensive matrix operations (the "mat" in MATLAB), as well as

application "toolboxes" covering neural networks, human speech, digital filters, a variety of

spectral transforms, and other advanced signal analysis. SIGNAL users have employed

MATLAB to perform linear predictive speech analysis, design and apply custom digital

filtering, perform wavelet analyses of time signals, and perform matrix-based analysis of

scanned physiology images.

SIGNAL users can access MATLAB’s capabilities by exporting SIGNAL data files to

MATLAB, performing desired analyses and signal transformations (such as filtering), then if

necessary exporting the data back to SIGNAL. This is achievable because both programs

provide basic and compatible facilities for importing and exporting data files. This

application note describes how to exchange data between the two systems. The first part

describes SIGNAL and MATLAB commands for data import and export, and the second

provides background on data storage issues that affect this process.

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