165 Appendix: MATLAB commands for matrices

$\gg$ x=3, t=2 [this assigns values $x=3$ and $t=2$

$\gg$x*t [multiply $x$ and $t$]

$\gg$x+t [add $x$ and $t$]

$\gg$x/t [divide $x$ by $t$]

$\gg$ x $\widehat{}$(-1.5) [raises $x$ to the power $-1.5$]

$\gg$2*((x+t)$\widehat{}$ 3) [computes $2{(x+t)}^3$]

$\gg$ pi [$\pi$ area of disc of unit radius]

$\gg$j [$i$ complex number]

$\gg$exp (3); [creates $e^3$]

$\gg$A=[5,7; 9,-2], B=[1,2,3;4,5,6] builds the matrices

$\gg$inv(A) [computes the inverse matrix of $A$]

$\gg$det(A) [computes the determinant of $A$]

$\gg$ trace(A) [computes the trace of $A$]