WFDB_wfdbgetskew
Keywords: wfdb_tools

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WFDB_wfdbgetskew

Usage: | `SKEW = WFDB_wfdbgetskew(SIG_NUM);` |
Input: | `SIG_NUM`: signal number (note: the first signal is signal number 0, etc.) |
Output: | `SKEW`: skew, in frame intervals |

This function gets the skew (as recorded in the '.hea' file, but in frame intervals rather than in sample intervals) of the specified input signal, or 0 if SIG_NUM is not a valid input signal number. Since sample vectors returned by `WFDB_getvec` or `WFDB_getframe` are already corrected for skew, `WFDB_wfdbgetskew` is useful primarily for programs that need to rewrite existing '.hea' files, where it is necessary to preserve the previously recorded skews.