Since previous release of EpiData Analysis quite a few changes have been implemented. Most of these fall in two groups:

a. Bug fixes of minor (spelling, parsing certain data sets etc) and major importance. Of major importance are a few in relation to aggregating data (aggregate and Stattables) and some if statements. Also some parts of other graphs, e.g. epicurves which would show incorrectly as connected rectangular bars when outcomes were separated by long periods.

b. Enhancements and further implementation of SPC (Statistical Process Control Graphs)

New chart types have been added (xbar-s, uchart , cchart), and further possibilities of doing proper analysis, e.g. freeze mean and limits based on first part of data, further warning tests (t4 and t5) and the setup of variables has been simplified. Additionaly a new "spc from scratch" menu has been added. You will find this on the graph toolbar submenu.

c. Translation is now possible. But further documentation and contact to translators is needed. Users will find the translation tools on the testing page (in windows and linux versions). Please also test these.

After test and removal of identified bugs this build will be released as v2.2. Known issues are: some datasets will give floating point error with xbar-s - please report on this. The internal validation routines used here are being updated to a new structure.

Users are highly urged to test the new build and report problems here or in the feature and bug reporting database.

The test versions are available from: http:\www.epidata.dk\testing.php

Other changes are expected soon in the documentation with a shift of core documentation (technical documentation) to a "wiki" based principle.

After v2.2 a quite long period should be expected without new builds (apart from removal of identified serious bugs). The core parts are being rewritten to a common form for as well EpiData Entry, Epic and Analysis. And next test release will be based on this new core for all three parts.

regards Jens Lauritsen EpiData Association