sum of multiplication for a vector and matrix

26 visualizaciones (últimos 30 días)
Abbi Hashem
Abbi Hashem el 27 de Jun. de 2019
Editada: Bruno Luong el 27 de Jun. de 2019
Say I have the following matrix and vector:
A = [ 2,3; 1,4] b= [ 5 , 7 ]
I want a code of the sum of the multiplication, such that each element of the matrix's first row are multiplied by the 1st cell of the vector, and the elements of the matrix's second row are multiplied by the 2nd cell of the vector, as follows:
2*5+3*5+1*7+4*7
( I will need this for a 1000*1000 matrix and a 1*1000 vector, but i used this example to clarify )

Respuestas (2)

James Tursa
James Tursa el 27 de Jun. de 2019
result = sum(b*A);

Bruno Luong
Bruno Luong el 27 de Jun. de 2019
Editada: Bruno Luong el 27 de Jun. de 2019
b*sum(A,2)
Less operations than the first solution.

Categorías

Más información sobre Logical en Help Center y File Exchange.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by