Skip to content

[nfc][hist] clarify bigaus argument order #21901

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
guitargeek merged 1 commit into from
Apr 13, 2026
+1 −0
Merged

[nfc][hist] clarify bigaus argument order #21901

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions hist/hist/src/TFormula.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -240,6 +240,7 @@ std::string vectorizedArgType()
2. Two Dimensional functions:
- `xygaus` is a substitute for `[Constant]*exp(-0.5*pow(((x-[MeanX])/[SigmaX]),2 )- 0.5*pow(((y-[MeanY])/[SigmaY]),2))`, a 2d Gaussian without correlation.
- `bigaus` is a substitute for `[Constant]*ROOT::Math::bigaussian_pdf (x,y,[SigmaX],[SigmaY],[Rho],[MeanX],[MeanY])`, a 2d gaussian including a correlation parameter.
Note the different order of parameters for bigaus: [Constant]=[0], [SigmaX]=[2], [SigmaY]=[4], [Rho]=[5], [MeanX]=[1], [MeanY]=[3]
3. Three Dimensional functions:
- `xyzgaus` is for a 3d Gaussians without correlations:
`[Constant]*exp(-0.5*pow(((x-[MeanX])/[SigmaX]),2 )- 0.5*pow(((y-[MeanY])/[SigmaY]),2 )- 0.5*pow(((z-[MeanZ])/[SigmaZ]),2))`
Expand Down