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2. WFDB Library Functions

This chapter describes the functions that are available to programs compiled with the WFDB library. The functions are introduced in several groups, with examples to illustrate their usage.

About these functions   General notes on functions. This node discusses arguments, return codes, and the organization of this section of the guide. 
The remainder of the nodes in this section describe functions for:
2.1 Selecting Database Records   Selecting database records (opening files).
2.2 Special I/O Modes   Setting the input sampling frequency and more.
2.3 Reading and Writing Signals and Annotations   Reading and writing signals and annotations.
2.4 Non-Sequential Access to WFDB Files   Non-sequential access to WFDB files.
2.5 Conversion Functions   Time and other conversion functions.
2.6 Calibration Functions   Calibrating signals.
2.7 Miscellaneous WFDB Functions   Attribute-reading and other functions.
2.8 memory allocation macros   Memory allocation with error-checking.
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