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The cal argument for
putcal is a pointer
to an object of type
contains information about signals of a specified type:
a pointer to a null-terminated string without embedded tabs or newlines.
This field describes the type(s) of signals to which the calibration
specifications apply. Usually,
sigtype is an exact match to
(or a prefix of) the
desc field of the
that describes a matching signal.
a pointer to a null-terminated string without embedded whitespace.
This field specifies the physical units of signals to which the
calibration specifications apply. Usually, the
units field of
WFDB_Calinfo structure must exactly match the
units field of
WFDB_Siginfo structure that describes a matching signal.
the customary plotting scale, in physical units per centimeter. WFDB
applications that produce graphical output may use
scale as a
default. Except in unusual circumstances, signals of different types
should be plotted at equal multiples of their respective
values (in physical units) corresponding to the low and high levels of
a calibration pulse. If the signal is AC-coupled (see below),
low is zero, and
high is the pulse amplitude.
a small integer that specifies the shape of the calibration pulse (see
‘<wfdb/wfdb.h>’ for definitions).
caltype is even if signals of
sigtype are AC-coupled, and odd if they are
The calibration list is a memory-resident linked list of
structures. It is accessible only via
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George B. Moody (email@example.com)