how to write a script for multiplication table

I am wondering how to write a script that will print a multiplication table that looks like this: 1 2 4 3 6 9 4 8 12 16 5 10 15 20 25

[Adam]

What is the logic behind the sequence? Once you define that the rest is quite simple with

doc sprintf

to print out the numbers in whatever format you choose.

[Ellis Fredella]

I need to use a for loop to do it, that's a great shortcut though.

Answer 1

[Markus Pichler]

it seems that the sequence contains all the multiples of integers up to the square, i.e., in other form

1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
and so forth

it will probably be more efficient with a loop, but you can also try

N = 5;
ix = [1:N].';
v = ix*ix.';
v(ix(:, ones(N, 1))<=ix(:, ones(N, 1)).').'

which throws away nearly half of the elements after generation

[Ellis Fredella]

yeah, I need to use a loop in order to answer the question in the most efficient way. Thanks though!