Lab 0 Getting familiar with Matlab
Name: Paul Gonzales *** MY GRAPHS HAVE A GRAY BACKGROUND BECAUSE I USE A MAC
Lab Session: W
Submit date:
EID: pag757
Question 1
B
Question 2
How to get x, which
(hint: function “inv”)
Please provide your commands (paste them to the report with your answer)
A = [1 3 2; 3 2 1; 2 1 3]
b = [0.41;0.37;0.36]
x = A\b
x = 0.0500
0.0800
0.0600
OR x = inv(A)*b
x =
0.0500
0.0800
0.0600
Question 34 Given a matrix A, (in order to answer these questions, I suggest you to try a matrix if you are not familiar
with matlab, but explain with words, not numbers of your matrix)
3 what is the expression of deleting its 2
nd
column?
A( :,2) = [ ]
4 what does A (2:2:7) mean?
Starting at the second element, displays every element by two’s each time to the seventh element
Question 58, what functions do the following commands perform? Please comment them.
Question 5
A = rand(4,5);
%creates a 4 by 5 matrix of random entries normally distributed between 0 %and 1
Question 6
B=floor(A);
%rounds the elements of A to the nearest integers less than or equal to A,
basically %creates a matrix of the same size as A into 0’s
Question 7
[m,n]=size(A);
%returns the size of matrix A in separate variables m and n
for
i = 1:m
%for i is in the first row
for
j=1:n
% for j is in the first column; will iterate through entire matrix
until end
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View Full DocumentQuestion 8
if
B(i,j)==0
%if at any of these positions the number is zero
sig = sig+1;
%add one to a counter that counts number of zeros
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 Spring '11
 Emelianov
 Vector Space, Ring, Tuple

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