1. invoking matlab
a. from the command line just type
> matlab
2. demonstration of interpreter
a. > help help
> help cos
> help fft
b. basic numerical computation:
> 2 + 3
c. variables:
> x = 3 * 2.01
> who
f. ans variable
g. vectors and matrices
> x=[1:10]
> x = [1 3 7 15]
> y=[1:0.1:10]
> z=[1:3;4:6;7:9]
h. matrix vs. pointwise operations: .*, ./, .^
> z*z
3. demonstration of scripting via matlab editor
a. invoking scripts from matlab
b. % as comments
c. ; to suppress output
4. useful functions
a. plotting: plot, subplot, figure, hold, stem, axis, title
b. math: e=exp(1), pi, sin, cos, atan, sqrt
> cos(pi)
> cos(0:0.1:pi)
c. sound: wavread, wavwrite, auread, auwrite, sound(y,fsamp)
d. signal processing: filter, firfilt, conv, freqz, fft, remez,
fir1, specgram, various window functions
> z=firfilt(fir1(256,0.05),y)
> specgram(z)
e. complex: j, real, imag, abs, angle, zprint, zcat, zvect
> real(j) % locate a complex number in cartesian form
> imag(j)
> abs(j) % locate a complex number in polar form; see help abs
> angle(j)
> zprint(j) % convenient graphing tools
> zvect(j)
> zcat([1 j 1+j])
5. > exit