Hello Marine,

On Tue, May 16, 2017 at 4:59 AM, Marine Albertelli <marine.albertelli@univ-pau.fr> wrote:

Good afternoon,

Could you please tell me what is the difference between the calculation of the R-factor and the NSS ?

I found that R-factor is equal to : sum((data - fit)^2)/sum(data^2) and
NSS = sum((data - fit)^2)/sum(data^2)*100

But when I compare the R-factor obtained by Athena and the NSS divided by 100 (calculated by myself) I didn't find the same results.

Did I make a mistake somewhere.

Thank you for your answer.

As you might imagine, it would be very difficult to answer a question about the comparison you made without seeing more details. Please post data (perhaps an Athena project file) and a detailed description of what you actually did, what result you got, and what result you expected to get.

Cheers,

--Matt