MATH/CMSC 206 - Introduction to Matlab

Answers to Self-Test

1. The following will do the job. Notice that if a longer vector is passed only the first two entries will be added:

function y=add(x) y=x(1)+x(2); end;

It's worth commenting that we could have a more sophisticated version which checks the argument and if it's not a vector an error is produced. Something like this:

function y=add(x) if (isvector(x)) y=x(1)+x(2); else disp(['Your argument ',char(x),' is not a vector!']); end;

2. We have to dig into our calculus knowledge for the formula. We'll do ours in meters per second:

function m=maxheight(v,h) m = -4.9*(v/9.8)^2+v*(v/9.8)+h; end;

3. This one will include an integral. Note that we could have done the integral ahead of time to create a formula:

function a=area(b) a = int('1/x',1,b) end;