On 8Nov1997, john <
[hidden email]> wrote:
 Are there any simple expressions for these octave expressions:
 In each case I introduce loops, multiplications or something a bit
 horrible to achieve something fairly simple.

 1. given matrix A and row vector V , add V to every row of A

 A + ones(rows(A),1) * V

 2. similar problem for multiply:

 A * diag(V)
 or A .* ones(rows(A),1) * V
Some future version of Octave will probably allow things like
A .+ V
and
A .* V
to do what you expect. For now, you have to use a multiplication or
indexing tricks to convert the vector to a matrix of the proper size.
 3. given a matrix A and a scalar s, take the minimum of an element of the
 matrix and the scalar.

 (A < s) .* A + (s <= A) .* s)
min (A, s)
 4. given two same sized matrices A, B, find the pairwise minimum of each
 element:
 (A < B) .* A + (A >= B) .* B
min (A, B)
I don't know of better ways to do the other tasks you mention.
jwe