Microsoft Excel Exponential Integral Function Approximation
Hi, Thank you for all your useful suggestions and good knowledge. However, I am not a math/computer-science/software savvy, and have no access to Maple, Mathematica, etc.
Exponential Integral Function Excel
The tools like quadpack look all jargon to me, although it seems to be a very useful tool for many. Following your sound suggestion, I installed R with ease, but have not been able to install RExcel (that you suggested) yet, perhaps because its installation requires a chain of other packages. For now I have to move on to my other projects. But later on, I will let you know after I figure out how to install RExcel (with all its related packages, such as statconnDCOM, etc), how to use it, and how to do the integral in R, and then how to call R's integrate straight from the spreadsheet. Hi, Thank you for all your useful suggestions and good knowledge. However, I am not a math/computer-science/software savvy, and have no access to Maple, Mathematica, etc. The tools like quadpack look all jargon to me, although it seems to be a very useful tool for many.
Following your sound suggestion, I installed R with ease, but have not been able to install RExcel (that you suggested) yet, perhaps because its installation requires a chain of other packages. For now I have to move on to my other projects. But later on, I will let you know after I figure out how to install RExcel (with all its related packages, such as statconnDCOM, etc), how to use it, and how to do the integral in R, and then how to call R's integrate straight from the spreadsheet. Best, As I've suggested, if you are interested in numerical integration you may be able to approximate fairly accurately the result using native Excel function(s).
Exponential Integral Values
If you want to proceed with the R and RExcel installation, from the wikipedia page for RExcel:. has a master installer RandFriendsSetup which installs R, many R packages, RExcel, and the infrastructure needed to run RExcel (rscproxy, rcom, the statconnDCOM server) Tushar Mehta (MVP Excel 2000-2015) Excel and PowerPoint tutorials and add-ins www.tushar-mehta.com.