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+Interpolated Marlov Chain (IMaCh program)\r
+\r
+This program is GPL licensed for the part the code that we wrote at\r
+INED. But currently (version 0.97b may 2004) maximization routines use\r
+a modified version of the patented routines from "Numerical Recipes in\r
+C". If you have the right to use the sources of their software you can\r
+get access to the source code and to the CVS tree of IMaCh.\r
+\r
+The program estimates Health Expectancies from Cross-longitudinal\r
+studies.\r
+The main publication is Lievre, A. Brouard. N, Heathcote\r
+Ch. Estimating Health Expectancies from Corss-longitudinal surveys,\r
+Mathematical Population Studies, 10(1), 2003, pp. 1-52.\r
+\r
+To be brief, for each people interviewed we have the age and health\r
+states at each interview. Also the month of death is known. We model\r
+the probability to be observed in any state at any age via a\r
+parametric model and estimate the parameters and their confidence interval\r
+by maximum likelihood, many tables and graphs are output in\r
+HTML. Graphs are built using gnuplot.\r
+\r
+In the Windows version, gnuplot is also distributed. Version 4 is out\r
+since early 2004 and is used by latest version of Imach (at least\r
+version 0.38i is required).\r
+IMaCh is supposed to work on Linux, MacIntosh and Windows (9X or\r
+NT/XP).\r
+\r
+WINDOWS\r
+On Windows it is distributed via a setup file (no more a zip file). As\r
+usual you can put the 'imach' directory in Program Files or\r
+wherever. The directory contains at least 2 directories, 'bin' for the\r
+binaries which are imach.exe and gnuplot.exe, doc for some of the\r
+documentation, and 'mytry' in order to test the program on a parameter\r
+file name 'mypar.imach'.\r
+\r
+You still can click on the imach.exe icon (which opens a DOS window)\r
+and drag your parameter file into the DOS windows and enter\r
+return. But with the newly installable version (>0.97) you can use the right\r
+click (once your mouse cursor is on an foo.imach file) to either edit the\r
+parameter file (with wordpad) or execute this parameter file via\r
+imach.\r
+If the program runs well you get a main foo.htm file which can be viewed\r
+with your browser and which includes all the results.\r
+\r
+As the program output a file named foo.gp which is executed by gnuplot\r
+in order to draw all the graphs, you can edit it and customize it at\r
+your will.\r
+\r
+By default the file gnuplot.exe is located on the same directory as\r
+imach and is used by imach with its absolute path. Thus if you have\r
+another gnuplot program which is in your path it will not be used by\r
+imach (we tried to simplify the installation process).\r
+\r
+If you download a newer version of IMaCh you are supposed to Uninstall the\r
+former version with the standard Install/Uninstall process of Windows.\r
+\r
+The Windows version is compiled via cygwin (gcc -mno-cygwin -o imach\r
+imach.c). It can be used on a command line with the command "imach\r
+foo.imach". But then imach.exe must be in your path. \r
+The program can be used (with more comfort?) on Linux or on a\r
+MacIntosh.\r
+\r
+Enjoy (?) using IMaCh.\r
+\r
+You may subscribe to imach-users@listes.ined.fr by sending a mail at\r
+imach-users-subscribe@listes.ined.fr and you can unsubscribe with a\r
+mail to imach-users-unsubscribe@listes.ined.fr .\r
+\r
+Nicolas Brouard (brouard at ined point fr)\r
+Agnès Lièvre (lievre chez ined dot fr)\r
+Christopher Heathcote\r
+\r
+ \r
+\r