EventData [{e1,e2,…}]
represents event data with explicitly specified censoring ei.
EventData [{e1,e2,…},{ci1,ci2,…}]
represents event data ei with censoring indicators cii.
EventData [{e1,e2,…},{cc1,cc2,…}]
represents event data ei with censoring counts cci.
EventData [{e1,e2,…},cspec,{tr1,tr2,…}]
represents event data with censoring and truncation tri.
EventData
EventData [{e1,e2,…}]
represents event data with explicitly specified censoring ei.
EventData [{e1,e2,…},{ci1,ci2,…}]
represents event data ei with censoring indicators cii.
EventData [{e1,e2,…},{cc1,cc2,…}]
represents event data ei with censoring counts cci.
EventData [{e1,e2,…},cspec,{tr1,tr2,…}]
represents event data with censoring and truncation tri.
Details
- EventData augments data with censoring and truncation information.
- The following event specifications can be used for ei:
-
ti no censoring; event happens at tti{ti,∞} right censoring; event happens at some t where ti≤t{-∞,ti} left censoring; event happens at some t where t<ti{ti,min,ti,max} interval censoring; event happens at some t where ti,min<t≤ti,max
- The following censoring indicators can be used for cii:
-
- The following count specifications can be used for cci:
-
{ni} ni events at ei{ni,ri} ni events and ri right-censored events at ei{ni,ri,li} ni events, ri right-censored events, and li left-censored events at ei
- The following event specifications can be used for tri:
-
ti,{ti,∞} left truncation; observable for t>=t_(i){-∞,ti} right truncation; observable for t<=t_(i){ti,min,ti,max} interval truncation; observable over ti,min≤t≤ti,max
- EventData can be used in statistics functions including:
-
- Properties of EventData can be obtained by specifying EventData […]["property"].
- A list of available properties can be obtained using EventData […]["Properties"].
- EventData has the following properties:
-
"CensoringIndicators" censoring indicators {ci1,…}"CensoredData" censored event intervals in the form {{t1,∞},…}"EmpiricalPDF" event locations and corresponding estimated weights"InputData" input event specification {e1,…}"MetaInformation" list of meta information rules"TruncationIntervals" truncation intervals {tr1,…}"CensoringType" most general type of censoring present"TruncationType" most general type of truncation present
Examples
open all close allBasic Examples (1)
Indicate right-censored data values:
Compute some descriptive statistics:
Scope (12)
Basic Uses (5)
Compute descriptive statistics for event data:
Fit nonparametric distributions to event data:
Fit parametric distributions to event data:
Plot the distribution and the empirical estimate:
Fit a model using SurvivalModelFit :
Empirical survival function with confidence bands:
Fit a model with covariates using CoxModelFit :
Parameter estimates:
A comparison of the survival rates for the two groups:
Specifying Censoring and Truncation (7)
Specify right censoring in a number of ways:
The objects all represent the same four observations where the third is right censored:
Left censoring:
The objects all represent the same four observations where the third is left censored:
Interval censoring:
The object represents four observations where the third is interval censored:
Use the count specifications to indicate multiple equivalent observations:
The objects each represent the same nine observations:
Specify left truncation:
The objects are equivalent representations of left-truncated, non-censored data:
Specify right truncation:
The object represents right-truncated, non-censored data:
Data can be both censored and truncated:
The object represents right-censored, left-truncated data:
Applications (1)
Mark right censoring on a plot of an estimated survival function:
The estimated survival function:
Create the censoring markers:
Show the censoring markers with the plot of the estimated survival:
Properties & Relations (1)
Descriptive statistics are based on the underlying SurvivalDistribution :
Sample estimates are given when they differ from population estimates:
History
Text
Wolfram Research (2012), EventData, Wolfram Language function, https://reference.wolfram.com/language/ref/EventData.html.
CMS
Wolfram Language. 2012. "EventData." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/EventData.html.
APA
Wolfram Language. (2012). EventData. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/EventData.html
BibTeX
@misc{reference.wolfram_2025_eventdata, author="Wolfram Research", title="{EventData}", year="2012", howpublished="\url{https://reference.wolfram.com/language/ref/EventData.html}", note=[Accessed: 06-January-2026]}
BibLaTeX
@online{reference.wolfram_2025_eventdata, organization={Wolfram Research}, title={EventData}, year={2012}, url={https://reference.wolfram.com/language/ref/EventData.html}, note=[Accessed: 06-January-2026]}