1) Evaluate the following expressions
a) 3 + 11
b) 15 + 7 * 4
c) 15 + (7 * 4)
d) (15 + 7) * 4
e) sqrt(22) * 45
f) pi^2
g) cos(pi)
h) cos(pi/2) + exp(4)

2) Set the following variables
t = 10
x = [0 2 4 6 8 10]
y = [0:5]
z = [12 -7 3 pi sqrt(2) -1]
a = cos(x)'
A = [ 3 2 1
4 7 13
0.5 pi 0.1
-3 2 0.734
12 7 10
1 1 1 ]

Now evaluate the following

a) exp(x .* t)
b) exp(x.* t)'
c) x - (2* y)
d) x - a
e) [A; a]
f) A(3,2)
g) A(:,2)
h) A(3,:)
i) x .* y
j) x * y
k) x' * y
l) x' .* y
m) exp(z)
n) exp(z')
o) mean(x)
p) sum(x)
q) sum(x')
r) sum(A)
s) sum(A')
t) t^2
u) x.^2
v) x' .^ 2
w) x^2
x) sqrt(z)
y) A(3,2) =1; A
z) sum(A)
sum(sum(A))
B = A(:)
sum(B)

3) Execute the following commands, explain why they do what they do
a) C = zeros(5,3)
b) D = ones(5,3)
c) size(D)
d) E = ones(size(D))
e) F = [0:10:100]'
G = sqrt(F)
plot(F,G)
f) figure; plot(F,G,'o')
g) figure
plot(F, [G 2*G 3*G 4*G 5*G 6*G 7*G 8*G])
legend('1', '2', '3', '4', '5', '6', '7', '8')

4) Execute the following commands, explain why they do what they do
r = [7 -6 3 -15 -22 9 7 30 -4 23 -8 -1]'
a) r2 = r;
for loc = 1:length(r),
if (r(loc) < 0),
r2(loc) = -r(loc);
else r2(loc) = r(loc);
end;
end;
r2
b) r3 = ( r < 0)
c) r4 = find( r < 0)
d) r5 = abs( r )

5) An analysis task (you will be quizzed on this task next week)
On the WebCT site is a file with two columns of numbers in an Excel file. The first column is an â€˜independent variableâ€™ while the second column is the corresponding dependent variable.
1) insert the numbers into MATLAB
2) find the mean, standard deviation, minimum, and maximum of the dependent variable
3) get a count of the values in the independent variable
4) plot the values of the dependent variable vs the independent variable (i.e., plot the values with the independent variable on the x axis and the dependent variable on the y axis. Draw a line between each of the data points and put a marker at each data point.
5) label the x axis (â€œtime (s)â€) and y axis (â€œconductance (mole/m2/s)â€)
6) use your name as the title for the graph
7) save the graph

1) Evaluate the following expressions a) 3 + 11 b) 15 + 7 * 4 c)...