Linear algebra

To define a column vector:

v = [1; 2; 3]

To define a row vector, two syntaxes are possible:

v = [1 2 3]

v = [1, 2, 3]

To define a matrix:

M = [1 2 3; 4 5 6; 7 8 9]

$$ \begin{bmatrix} 1 & 2 & 3
4 & 5 & 6
7 & 8 & 9
\end{bmatrix} $$

Get element from a vector v:

• to get element in the <i>-position:

  v(<i>)

Get element from a matrix M:

• to get the element in the <i>-row and <j>-column:

  M(<i>,<j>)

• to get the whole <i>-row:

  M(<i>,:)

• to get the whole <j>-column:

  M(:,<j>)

• to get the whole <j>-<k>-columns:

  M(:,[<j>,<k>])

• to get the whole <i>-<k>-rows:

  M([<i>,<k>],:)

The struct() method allows to save data in the form <field>, <value>.

g = list("g1", "g2", "g3")
p = struct()

for i = g
    p(i) = i
end

fn = fieldnames(p)
for j = fn'
    disp(p(j))
end