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6. Programming Examples

The programs in this chapter are useful as models for a variety of applications that use the WFDB library. The line numbers are for reference only; they are not part of the programs. Any of these examples can be compiled (under Unix) using a command of the form

cc file.c -lwfdb

or, if the WFDB library or its *.h files are not in the standard locations:

cc `wfdb-config --cflags` file.c `wfdb-config --libs`

where file.c is the name of the file containing the source; see section Using the WFDB Library, for further information. The sources for these examples are included in the WFDB Software Package, within the ‘examples’ directory.

Example 1: An Annotation Filter An annotation filter.

Example 2: An Annotation Translator A WFDB-to-AHA format annotation translator.

Example 3: An Annotation Printer An annotation printer.

Example 4: Generating an R-R Interval Histogram Generating an R-R interval histogram.

Example 5: Reading Signal Specifications A program that prints signal specifications.

Example 6: A Differentiator A differentiator.

Example 7: A General-Purpose FIR Filter A general-purpose FIR filter.

Example 8: Creating a New Database Record Creating a new WFDB record.

Example 9: A Signal Averager A signal averager.

Example 10: A QRS Detector A QRS detector.

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