cleara=[1 2 3];b=[4;5;6];a*c{Undefined function or variable 'c'.} c=b
c =
4 5 6
a*c
ans =
32
dot(a,c)
ans =
32
A=c*a
A =
4 8 12 5 10 15 6 12 18
a*a{Error using * Inner matrix dimensions must agree.} a.*a
ans =
1 4 9
a.^2
ans =
1 4 9
exp(a)
ans =
2.7183 7.3891 20.0855
log(a)
ans =
0 0.6931 1.0986
exp(a)
ans =
2.7183 7.3891 20.0855
log(ans)
ans =
1 2 3
sqrt(a)
ans =
1.0000 1.4142 1.7321
format longsqrt(a)
ans =
1.000000000000000 1.414213562373095 1.732050807568877
format2^(-24)
ans =
5.9605e-08
sum(b), mean(c)
ans =
15
ans =
5
b=a.^2
b =
1 4 9
sum(b), mean(c)
ans =
14
ans =
5
pi
ans =
3.1416
y=tan(pi/6)
y =
0.5774
B=[-3 0 -1;2 5 -7; -1 4 8]
B =
-3 0 -1 2 5 -7 -1 4 8
x=B\c
x =
-1.2995 1.3779 -0.1014
norm(B*x-c)/norm(B)*norm(x)
ans =
3.4722e-16
norm(B*x-c)/(norm(B)*norm(x))
ans =
9.6513e-17
e=eig(B)
e =
-3.1361 + 0.0000i 6.5680 + 5.1045i 6.5680 - 5.1045i
[V,D]=eig(B)
V =
-0.9829 + 0.0000i 0.0385 + 0.0393i 0.0385 - 0.0393i 0.1266 + 0.0000i 0.8005 + 0.0000i 0.8005 + 0.0000i -0.1337 + 0.0000i -0.1683 - 0.5725i -0.1683 + 0.5725i
D =
-3.1361 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 6.5680 + 5.1045i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 6.5680 - 5.1045i
[H,I]=round(eig(B)){Error using roundToo many output arguments.} round(V)
ans =
-1.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 1.0000 + 0.0000i 1.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 - 1.0000i 0.0000 + 1.0000i
round(D)
ans =
-3.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 7.0000 + 5.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 7.0000 - 5.0000i
v=1:6
v =
1 2 3 4 5 6
w=2:3:10
w =
2 5 8
y=1:-0.25:0
y =
1.0000 0.7500 0.5000 0.2500 0
C=[A,[8;9;10]]
C =
4 8 12 8 5 10 15 9 6 12 18 10
C, D=[B;a]
C =
4 8 12 8 5 10 15 9 6 12 18 10
D =
-3 0 -1 2 5 -7 -1 4 8 1 2 3
C(2,3)
ans =
15
C(2:3,1:2)
ans =
5 10 6 12
I3=eye(3,3), Y=zeros(3,5), Z=ones(2)
I3 =
1 0 0 0 1 0 0 0 1
Y =
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Z =
1 1 1 1
diary off