Good Morning, Please I using TMatrices in my work, Transpose and TMatric division is giving an error. Is there anything I am missing? Thank you for your help. This is the error and the code is attached. root [0] Processing macro6.C... In file included from input_line_8:1: /home/harriet/fair_inst…

With your macro I get: Processing macro6.C... In file included from input_line_9:1: **/Users/couet/Downloads/macro6.C:53:13:** **error:** **no matching member function for call to 'Use'** A_1.Use(Matrix_A); **~~~~^~~**

This works for me but not the transpose and division Double_t Matrix_A[4] = {1,dt,0,1}; A_1.Use(A_1.GetNrows(), A_1.GetNcols(), Matrix_A);

The available arithmetic operations are described in the links given in: [image] How to read and save data in a TMatrix Newbie ROOT Manual → Functional parts → Mathematical libraries → Linear algebra packages → Matrix package ; ROOT Reference Documentation → Functional P…

n file included from input_line_8:1: /home/harriet/fair_install/ATTPCROOTv2/build/macro6.C:106:7: error: use of undeclared identifier ‘Div’ K = Div(TMatrixD(P_pred, TMatrixD::kMultTranspose,H_1) , ((H_1 * TMatrixD(P_pred, TMatrixD::kMultTranspose,H_1)) + R_1)); ^

And where do you see “Div” in the list of available arithmetic operations?

I saw it here: Div() template<class T , unsigned int D, unsigned int D2, class R1 , class R2 > Expr < BinaryOp < DivOp < T >, SMatrix < T, D, D2, R1 >, SMatrix < T, D, D2, R2 >, T >, T, D, D2, typename AddPolicy < T, D, D2, R1 , R2 >::RepType > ROOT::Math::Div ( const SMatrix < T, D, D2, R1 > & lhs, …

“SMatrix” is unrelated to “TMatrix”.

Even here : Element wise division ElementDiv(A,B) A(i,j)/= B(i,j)

okay I soo confused what can I use please

Use a “ linear algebra package ” that best suits your needs.

TMatrixD help

Newbie

Wile_E_Coyote January 25, 2023, 11:36am 4

The available arithmetic operations are described in the links given in: