Find array row element in another index array

Given two array Idx_of_pt and P, I'd like to find all the row element in P from Idx_of_pt

Idx_of_pt=[1 2 3;4 6 7;2 3 5];

P=[-0.03 0.12 0.04

-0.94 0.12 0.01

-0.06 0.15 0.037

-0.22 0.13 0.02

-0.26 0.12 0.07

-0.25 0.16 0.62

-0.37 0.17 0.19 ]

so the result should be [-0.03 0.12 0.04 ; -0.94 0.12 0.01 ; -0.06 0.15 0.037

-0.22 0.13 0.02 ; -0.25 0.16 0.62 ; -0.37 0.17 0.19

-0.94 0.12 0.01 ; -0.06 0.15 0.037 ; -0.26 0.12 0.07]

(they can form triangles)

Any elegant method ?

Answer 1

[KSSV]

iwant = P(reshape(dx_of_pt',[],1),:) ;

[AI-CHI Chang]

It works ! Thanks for your help !

I'll go and check how it works