The EpiR package

Click here to download version 0.9-25 of the epiR package for Windows. Click here to download version 0.9-25 of the epiR package for Linux. Click here to view the package documentation (PDF format). The epiR package can now be downloaded directly from CRAN.

LAST UPDATE 24 February 2010.

epi.conf: documentation improved.

epi.stratasize: Argument name for relative error changed (to avoid confusion).

epi.simplesize: Argument name for absolute error changed (to avoid confusion).

epi.2by2: Documentation details a graphical way to compare strata-level and MH adjusted ORs.

epi.dsl, epi.mh, and epi.iv: Now handle zero cell frequencies.

epi.studysize: Documentation improved.

epi.prev: Exact binomial confidence intervals implemented for apparent prevalence.

epi.detectsize: Now includes option for adjusting for correlated test results.

epi.tests: Exact binomial confidence intervals implemented.

epi.dsl, epi.mh, and epi.iv: Inconsistencies in format of output corrected.

epi.conf: Exact binomial confidence intervals implemented for incidence risk, incidence rate and prevalence.

epi.2by2: Documentation improved. Multiplier option added. Exact binomial confidence intervals now calculated.

epi.dms: Now handles degrees and decimal minutes.

epi.prev: Documentation improved.

epi.cpresids: Calculate residuals based on covariate pattern.

epi.cp: Identify covariate patterns in a data set.

epi.pooled: Estimate herd level sensitivity and specificity on the basis of pooled samples.

epi.tests: Youden's index, number needed to diagnose, diagnostic odds ratio added.

epi.ccc: Example modified.

epi.interaction: Compute the relative excess risk due to interaction in a case-control study.

epi.stratasize: Documentation improved.

epi.conf: Confidence intervals for SMRs set to use observed number of cases and population size.

epi.edr: Confidence intervals for EDR algorithm improved.

epi.tests: Confidence interval for likelihood ratios added.

epi.dms: Convert decimal degrees to DMS and vice versa.

epi.tests: Likelihood ratios added.

epi.2by2: Consistency in confidence interval calculations improved.

epi.asc: Export R matrix to an ASCII raster file (suitable for use in a GIS package).

Disclaimer: these libraries are work in progress. Additional functions are added as the need arises. These links will be updated as further functions are added. Suggestions most welcome!