Today, NumXL 1.57 SINGA has gone into Beta testing in preparation for official release, which is about a week away.
The X11/X12-ARIMA (x12a) is developed by the U.S. Census Bureau, but NumXL brings the vast functionality of the x12a program into Excel through a friendly user-interface and add-in functions. As a result, an Excel user can run a time series seasonal adjustment and/or forecast in a snap. Furthermore, NumXL offers access to all raw files (input/output) that are generated in the process shall a user wish to examine them manually.
Why not develop x11/x12a natively in NumXL? X12a has a long history. Scores of bright people worked on it, and they continue to support and enhance it further. The program and the methodology have gained a wide acceptance in many applications. Why reinvent the wheel? We believe there is enormous value in just bridging the gap between Excel users and this great application.
Do I need to download anything to use X12-ARIMA with NumXL? No. You don’t need to download or install any program other than NumXL. Our installer will copy the supported version of the X12-ARIMA program.
I have X12-ARIMA already installed, do I need to uninstall it first? No. NumXL will only call/invoke the X12 program that was installed by the setup program.