How to handle THnSparse larger than 500Mo

[Wile_E_Coyote]

I think you can use the code from here (“GammaMult” = “No_Clover”):

Help on Method/s to create Tree from multi-fold gamma-ray coincidence data

I think you can easily reduce the amount of the required RAM by (up to) a factor 6, if you explicitly sort your gammas: #include <algorithm> // ... for(int j = 0; j < (No_Clover - 2); j++) { for(int k = (j + 1); k < (No_Clover - 1); k++) { // (k > j) for(int l = (k + 1); l < No_Clover; l++) { // (l > k) // ... // Double_t x[3] = {(Double_T_t)Eclab[j], (Double_T_t)Eclab[k], (Double_T_t)Eclab[l]}; // Double_t x[3]…