strdat

WFDB_Date strdat(char *string)

Return:

(WFDB_Date)

Julian date corresponding to the argument

This function converts string into a Julian date. The argument should be in the format used by datstr; if string is improperly formatted, strdat returns zero. Note that dates such as `15/3/89' refer to the first century A.D., not the twentieth. For example, the interval in days between the events commemorated by the French and American national holidays is strdat("14/7/1789") -- strdat("4/7/1776").

The next four functions convert between analog-to-digital converter (ADC) units and physical units, using as a conversion factor the gain for the specified input signal. The first two (aduphys and physadu) are general-purpose functions that convert absolute levels (i.e., they account for non-zero baseline values); the last two (adumuv and muvadu) are for use with millivolt-dimensioned signals only, and convert potential differences (i.e., adumuv(s, 0) = muvadu(s, 0) = 0 for all s, irrespective of the baseline values specified in the header file). Normally, these functions should be invoked after isigopen or wfdbinit, either of which will determine the gain from the `hea' file. If this is not done, or if the header file indicates that the gain is uncalibrated, or if the specified input signal is not currently open, a gain of WFDB_DEFGAIN (defined in `<wfdb/wfdb.h>') ADC units per millivolt, and a baseline of zero, are assumed. If the physical units (see section 3.1 Signal Information Structures) are not millivolts, adumuv and muvadu convert to and from thousandths of the defined physical units. Note that adumuv and muvadu deal exclusively with integers, but aduphys returns and physadu accepts double-precision floating point physical values.