init.m Line-by-Line

init.m contains variable assignments and one actual command. Each of these lines could also be individually entered by hand at the command prompt. (The symbol % tells MATLAB to ignore everything else that follows on that particular line. It usually indicates a comment/description inserted by the author of the M-file.)

N=20; $\parbox{14.5cm}{Creates the variable {\tt N} and assigns it the num... ...formation to the screen. Try entering just {\tt N=20} to see the difference.)}$

ftx='2*t*x'; $\parbox{13cm}{Creates the variable {\tt ftx} and assigns it the str... ... but has several advantages. The symbol \lq\lq {\tt *}'' refers to multiplication.}$

initax=[-2,2,-2,2]; $\parbox{12cm}{ Creates the variable {\tt initax} and assigns it the... ...\tt [-2,2,-2,2]}. Row elements can be separated by either a comma or a space.}$

ax=initax; $\parbox{13cm}{Creates the variable {\tt ax} and assigns it whatever value the variable {\tt initax} has.}$

axis(ax) $\parbox{14cm}{{\tt axis} is a standard MATLAB command that sets the... ... [-2,2,-2,2]}. This command will also open a figure window if none is active.}$

t=ax(1):(ax(2)-ax(1))/(N-1):ax(2);

$\parbox{15cm}{Creates the variable {\tt t} and assigns it the row-v... ...r to the first and second elements of the row-vector {\tt ax}, respectively. }$

t0=1.0932; x0=0.95208; $\parbox{10.5cm}{ Creates the variables {\tt t0, x0} and assigns them the number values 1.0932 and 0.95208.}$

C=0.28817; $\parbox{14cm}{Creates the variable {\tt C} and assigns it the number value 0.28817.}$

ftxsln='C*exp(t$\wedge$2)'; $\parbox{11cm}{ Creates the variable {\tt ftxsln} and assigns it the... ...heses in its call not square brackets. This is true for all MATLAB functions.}$