how can I multiplying matrix elements

How can I multiple elements of one column or row of a matrix?

Answer 1

[Image Analyst]

% Multiply a row by some number.
theRow = 42; % or whatever.
myMatrix(theRow, :) = someNumber * myMatrix(theRow, :);
% Multiply a column by some number.
theColumn = 13; % or whatever.
myMatrix(:, theColumn) = someNumber * myMatrix(:, theColumn);

[Amir Ehsani]

 i want to multiple a(1,1)*a(1,2)*...*a(1,n)