三，Mathematics

1. create matrices

magic(4), pascal(3), zeros(3,2), ones(5,5), randi(10,3,2) ...

[ ] putting vectors(rows, columns) together by using [ ]

2. matrices operations

A + B, A * B, A .* B, 

A\' and A.\' are both transpose, for A containing complex numbers (a+bi), you have to also transpose complex numbers (a-bi) if A\', while A.\' does not.

Identity Matrix eye(m, n)

inv(A)

det(A)

cond(A)

norm(v, n), norm(A, n)

五，Programming

a = randi(100, 1)

if rem(a, 2) == 0

　　disp("even")

elseif a < 80

　　disp ...

else

　　disp ...

end

switch daystring

　　case \'monday\'

　　　　disp ...

　　case \'tuesday\'

　　　　disp ...

　　otherwise

　　　　disp ...

end

yournumber = input("enter a number:")

A == B returns where aij == bij, is a matrix too. 

if isequal(A, B) returns a logical number 1 or 0

isempty

all

any

for n = 3 : 32

　　rn = rank(magic(n))

end

while

continue

break