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(defined)EvaluationExample 1Example 10Example 2Example 3Example 4Example 5Example 6Example 7Example 8Example 9examplesExercisesexercises 1Extensionsexternal identifiers (restrictions)file containing WFDB pathfile namesfile typesfilenames of WFDB files (obtaining)filter (digital)finding WFDB filesfirst difference flushcalflushcal (6.0)flushing calibration listflushing output annotations and samplesflushing WFDB I/O format (annotation file)$format (signal file)(Fortran bindings,frame (defined)0frame (of samples)4frame interval (defined)8frame rate<frame rate (defined)@frames (reading)Dfrequency (counter)Hfrequency multiplierPftpTFunction and Macro IndexXfunction arguments\function name restrictions`function return codesdFunctionshfunctions in the WFDB librarylgainpgain (defined)xgetann|getbasecount (5.2)getcalgetcal (6.0)getcfreq (5.2)getframegetframe (9.0)getinfogetinfo (4.0)getspfgetspf (9.6)getvecgetvec buffer sizegetwfdbGlossaryGNU emacsGNU/LinuxGraphicsGuidehea (defined)hea fileheader file (defined)Header FilesRheader files (creating)header files (modifying)header info (reading)header info (writing)high-resolution mode (defined)httpI/O (completing)iannclose (9.1)iannclose and oannclose iannsettimeindirect WFDB pathinfo (in header files) info string (defined)(information structure (annotator),information structure (signal)0initial value of signal4initialization8input buffer size<Installation@interpolationDintersignal skewLintroduction to functionsXisann\isgsettime`isigopenhisigsettimepisoelectric levelxisqrs|Julian date (conversion to and from string)label (beat)legal annotation codelength of signal filelibrary functionsLinuxloader optionslocal recordlocal record (defined)location (of annotation)location (of annotations)low-resolution mode (defined)macrosMakertfmamapmap1map2mapping annotation codesMapping macrosMatlab bindingsMGH DBMinGWmiscellaneous functionsMIT DBMIT DB (defined)MIT format (defined)MIT-format annotation filemnemonic (annotation)modification labelmodification label (defined)modifying header files mstimstrMS-Windows installationmulti-frequency record (defined)multifrequency recordsmulti-frequency records multi-frequency records (reading),multiple record access4multiplexed signal file<multiplexed signal file (defined)DMultiplexed Signal FilesHmulti-segment record (defined)Lmulti-segment recordsPmulti-segment records (creating)Xmuvadu\name restrictions`nested recordsdNETFILEShNETFILES (defined)newcalnewcal (6.0)newheadernine-track tapenine-track tape (defined)Rnoise stress testnoisy signals (annotating)non-sequentialnon-sequential accessNOTQRS (annotation code)oannclose (9.1)Octave bindingsopening annotation filesopening database filesopening signal filesoperating systems (supported)order of annotationsosigfopenosigopenOther installationother languagesoutput buffer sizeoversampled signal (defined)oversampled signalsOverviewpath (database)pathnames of WFDB files (obtaining)physadu (6.0)physical unit (defined)physical unitsphysical units (conversion to and from adus)physical zero (defined)physical zero level PhysioBank$PhysioNet(Piped and Local Records,piped record0piped record (defined)4pipes (as WFDB files)8plotting scale<pointer arguments@print samplesDprogramming examplesHprolog (defined)Lprolog (in signal files)Ppulse limits (calibration)\pulse shape (calibration)`putanndputcallputcal (6.0)pputinfotputinfo (4.0)xputvec|putvec buffer sizeQRS annotation codeQRS detectorQRS labelrandom accessreading 9-track tapereading annotationsreading calibration filesreading signalsreading the WFDB pathRecent changesrecordrecord (defined)record (piped)record namerecord name (defined)record names (restrictions)records (creating)reference annotation file (defined)reference annotationsreference point (on QRS)resamplingresolutionrestrictions on function and variable namesretrieving calibration datareturn codesrunning examplesampfreqsamplesample (defined)sample framesample intervalsample interval (defined) sample number$ned)Rsample number (defined)(samples per frame,sampling frequency0sampling frequency (changing)8sampling frequency (defined)<scale (amplitude)@scales (time and amplitude)LScilab bindingsPselectingTselecting database recordsXsetanndesc (5.3)\setannpos (6.0)`setannstr (5.3)dsetbasecount (5.2)hsetbasetimelsetcfreq (5.2)tsetecgstrxsetgvmode|setgvmode (9.0)setheadersetheader (5.0)setibsizesetibsize (5.0)setisqrs (6.0)setmap1 (6.0)setmap2 (6.0)setmsheadersetmsheader (9.1)setobsizesetobsize (5.0)setsampfreqsetting annotation code stringssetwfdbsignalsignal (associating annotation with)signal (defined)signal and annotation I/Osignal filesignal file (defined)signal file (local)signal file (on tape)signal file (piped)signal file checksumsignal file descriptionsignal file formatsignal file lengthsignal file nameSignal Filessignal files (creating) signal files (opening) signal group signal group (defined) signal group number (defined) signal I/O signal information structure signal number$ signal number (defined)( Signal processing, signal type0 signals (non-sequential access)4 signals (oversampled)< signals (reading)@ signals (writing)H simultaneous recordsL skewP skew (defined)X skipping through WFDB files\ sortann` Sourcesd Special Filesh special files (as signal files)l standard annotation filep Standard I/Ot standard I/O (as WFDB files)x standard time format (defined) standard time format (examples) start of sample data storing calibration data strann (5.3) strdat strecg string (conversion to and from annotation code) Lstring (conversion to and from Julian date) string (conversion to and from time) strtim structure (annotation) structure (annotator information) structure (signal information) subtyp (in NOISE annotation) subtype (annotation) suppressing errors system-wide database directory (defined) tape tape (defined) tape counter time time (conversion to and from string) time (defined) time of annotation time of day (setting) timstr timstr and strtim Top type (annotation) ungetann ungetann (5.3) units (ADC) units (physical)$ Unix character devices (as signal files)0 Unix installation4 unreading annotations8 unsorted annotation files< URL@ UsageD user-defined fields in annotationH UsingL variable name restrictionsP virtual array of annotationsT voltage (conversion to and from adus)X waveform editor` Web browserp WFDB (environment variable)t WFDB Applicationsx WFDB files (finding)| WFDB library WFDB library (compiling with) WFDB library functions WFDB path WFDB path syntax WFDB_AHA_READ WFDB_AHA_WRITE WFDB_Anninfo structure (defined) WFDB_Anninfo structures WFDB_Annotation structure (defined) WFDB_Annotation structures WFDB_Annotator (defined) WFDB_Calinfo structure (defined) WFDB_Calinfo structures WFDB_Date (defined) WFDB_Frequency (defined) WFDB_Gain (defined) WFDB_Group (defined) WFDB_READ WFDB_Sample (defined) WFDB_Siginfo structure (defined) WFDB_Siginfo structures WFDB_Signal (defined) WFDB_Time (defined) WFDB_WRITE WFDBANNSORT (environment variable) WFDBCAL (environment variable) wfdberror wfdberror (4.5) wfdbfile wfdbfile (4.3) wfdbflush wfdbgetskew wfdbgetskew (9.4)  wfdbgetstart wfdbgetstart (9.4) WFDBGVMODE (environment variable)$ wfdbinit, wfdbquiet4 wfdbquiet and wfdbverbose8 wfdbquit< wfdbsetskewD wfdbsetskew (9.4)H wfdbsetstartL wfdbsetstart (9.4)P wfdbverbose (4.0)T wrappers for FortranX wrappers for Matlab, Octave, or Scilab\ writing 9-track tape` writing annotationsd writing calibration listh writing signalsl X Window Systemp X11t notation time of day (setting) timstr timstr and strtim Top type (annotation) ungetann ungetann (5.3) units (ADC) units (physical)$ Unix character devices (as signal files)0 Unix installation4 unreading annotations8 unsorted annotation files< URL@ UsageD user-defined fields in annotationH UsingL variable name restrictionsP virtual array of annotationsT voltage (conversion to and from adus)X waveform editor` Web browserp WFDB (environment variable)t WFDB Applicationsx WFDB files (finding)| WFDB library WFDB library (compiling with) WFDB library functions WFDB path WFDB path syntax WFDB_AHA_READ WFDB_AHA_WRITE WFDB_Anninfo structure (defined) WFDB_Anninfo structures WFDB_Annotation structure (defined) WFDB_Annotation structures WFDB_Annotator (defined) WFDB_Calinfo structure (defined) WFDB_Calinfo structures WFDB_Date (defined) WFDB_Frequency (defined) WFDB_Gain (defined) WFDB_Group (defined) WFDB_READ WFDB_Sample (defined) WFDB_Siginfo structure (defined) WFDB_Siginfo structures WFDB_Signal (defined) WFDB_Time (defined) WFDB_WRITE WFDBANNSORT (environment variable) WFDBCAL (environment variable) wfdberror wfdberror (4.5) wfdbfile wfdbfile (4.3) wfdbflush wfdbgetskew wfdbgetskew (9.4)  Bbaseline amplitude (defined)datstr and strdatheader files (creating)noise stress testsample number (defined)string (conversion to and from Julian date)wfdbgetstart/&;)Lz cAbout this help filelPrefaceRecordsSignals, Samples, and TimeAnnotations$Applications<About this GuideRecent changesUsing the WFDB LibraryA Trivial Example Program in Cb Compiling a Program with the WFDB LibraryUsing the WFDB library with other languagesƅThe Database Path and Other Environment VariablesRunning the Example ProgramA Note on IdentifiersMore About the WFDB PathExercisesWFDB Library FunctionsWAbout these functions=Selecting Database Recordsannopenisigopen(osigopen osigfopenhwfdbinit@Reading and Writing Signals and Annotationsˎgetvecgetframe'putvec getannungetann@putannNon-Sequential Access to WFDB FileswisigsettimeFisgsettime5iannsettime׎Conversion Functions"annstr, anndesc, and ecgstry ۇCalibration Functions1calopengetcalf putcal newcalflushcalMiscellaneous WFDB FunctionsRnewheaderesetheaderDsetmsheader3wfdbquitiannclosewfdbquietR wfdberror" sampfreqsetsampfreqsetbasetimesetgvmodegetspf݇ޑsetwfdb getwfdb wfdbfile wfdbflush7 getinfou putinfoU setibsizeڂ setobsizeӆ wfdbgetskew wfdbsetskew wfdbgetstartR wfdbsetstart̕ Data Types* Signal Information StructuresK Calibration Information Structures Annotator Information Structures Annotation Structures Annotation Codes Macros for Mapping Annotation Codes! Database Files Header FilesV Signal Filesx Annotation Files Calibration Files AHA Format Files Using Standard I/O for Database Files. Multiplexed Signal Files Multi-Frequency Records Multi-Segment Records Simultaneous Access to Multiple Records Signals That Are Not Stored in Disk Files Piped and Local Records NETFILES Annotation Order Programming Examples Example 1: An Annotation FilterExample 2: An Annotation Translator Example 3: An Annotation Printer&Example 4: Generating an R-R Interval HistogramExample 5: Reading Signal SpecificationsExample 6: A Differentiator Example 7: A General-Purpose FIR FilterLExample 8: Creating a New Database Record Example 9: A Signal Averager]Example 10: A QRS Detectorn ExercisesΑGlossaryInstalling the WFDB Software PackageHow to obtain the WFDB Software PackageUnix, GNU/Linux, and similar operating systemsMS-WindowsOther systems WFDB Application Programs& How to use these programs Annotation File ProcessingEvaluation of ECG AnalyzersSignal Processing Applicationse Graphical Applications5ExtensionsSourcesAnswers to Selected ExercisesConcept IndexFunction and Macro Index;*About Makertf;cgstry ۇCalibration Functions1calopengetcalf putcal newcalflushcalMiscellaneous WFDB FunctionsRnewheaderesetheaderDsetmsheader3wfdbquitiannclosewfdbquietR wfdberror" sampfreqsetsampfreqsetbasetimesetgvmodegetspf݇ޑsetwfdb getwfdb wfdbfile wfdbflush7 getinfou putinfoU setibsizeڂ setobsizeӆ wfdbgetskew wfdbsetskew wfdbgetstartR wfdbsetstart̕ Data Types* Signal Information StructuresK Calibration Information Structures Annotator Information Structures Annotation Structures Annotation Codes Macros for Mapping Annotation Codes! Database Files Header FilesV Signal Filesx Annotation Files Calibration Files AHA Format Files Using Standard I/O for Database Files. Multiplexed Signal Files Multi-Frequency Records Multi-Segment Records Simultaneous Access to Multiple Records Signals That Are Not Stored in Disk Files Piped and Local Records NETFILES Annotation Order Programming Examples Example 1: An Annotation Filter/&;)L4+Z ?"/ 0Fۊ JkA Zx < $zun=}nw c{l kZR,Ş Z EM 0: gD^aB*4ZU `nBaK &PY 0H pkDDŲ l_S%Pp 3-xɓz u )Pp +| 0?11b@rA1x-WSjۿJݒ mރ( Us jₔ 7 S皈W Q+Rx  3ys$3_B`Y f^)2d@ޡA9 K (qy7i H`[ }V  ]ͨ8 u,Z 3p~3ֳ)9J>:4 oH~m{ SJTJOUJ  e zaE" 羊"W+G$+ V-Qj9a < j<΅'<"? OB;^2D sKmqcK啨L I]LpDL~NpjWێ jWGjW' jWojWWjWjW jWjWB d,[6u_c >c 吵d Ϣj#5Aw w