Suppose I have installed an application (e.g. statistical software SAS 9.2 or 9.3) under Windows 7 on an ntfs partition. My Ubuntu 12.04 is installed on another ext4 partition. From ubuntu, I can see the partition where the application is installed via mounting it. Is it possible to run the application under Ubuntu? How is it done then? Thanks!
As in the previous answer, you can run Windows applications with a variable amount of success using Wine. A list detailing the extent of compatibility can be found at the website.
You can not run the application from where it is currently installed on your Windows partition. A discussion on this can be found at the Ubuntu forums. You will need the installation media to install the software in Ubuntu using Wine.
You might have problems running SAS in Wine according to their compatibility ratings. After less than stellar results with MS Office in Wine or Crossover for Linux, I started using a hardware virtualization solution (Virtualbox to be precise). This was relatively easy to set up and is something you may want to explore. I eventually weaned myself off the dual boot I'd employed for years.
Edit: The final option you may want to consider is a either a Linux version of one of the statistical analysis packages (SPSS produce a version) or a free version such as PSPP. I can't comment on the quality of the latter, but I've heard good things.
I believe you can run it by emulating the