Introduction to MATLAB Step by Step Exercise Assignment

Large list of exercise: start doing now!

1 35: Basic (variables, GUI, command window, basic plot, for, if, functions)

36 40: Medium (functions)

41 45: Medium (matrices)

46 51: Medium (plot)

52 55: Medium (integration)

56 60: Advanced (combined problems)

• Open MATLAB(student AMO/AIR)
• Make sure that you recognize the Graphic User Interface (GUI)
• Look for the command window, and use it as a calculator:
  • 2+2
  • 2 * 2
  • 22

• Create variables at the command window:
• Create variables based on other variables:
• Create vectors:
• Operation with vectors:
• Create column vectors
• Other ways to create vectors:
• Creating Matrices:
• Operation with Matrices:
• Accessing elements in the Matrix:
• Check that your variables are at the workspace:
• Create and save a script (no spaces, MATLABfolder):
• Start your script by clearing the variables anssumming 2 + 2:
• Run your script and check the answer (ans) on the command window:
• Create a vector in your script with a list of dates:
• Realize that, by putting ; at the end of the line the command does not appear at the command window:
• Sum up all the ages:
• Save the number of dates inside the vector "dates" into a variable ":
• Write a comment
• Calculate the average of the dates by dividing the sum by the number of elements
• Display in the command line a text, and later the average
• Plot the sin(dates)
• Plot (dates)2/ (150000) 0.02* (dates) + 12:
• Use "hold on" between the two plots :
• Realize that we can transform numbers to string and use it to display test inside a "disp" as a vector
• Create a for to read each element of the vector and display its value
• Create a "if" to check if a year is before, equal or after year 1800
• Incorporate and modify the "if" inside your "for", to check if a date is before, after or equal 1814
• Adapt your code from 29 to solve the example from last week:

Create a a code that checks if you can buy alcohol in Norway, the type of alcohol, if you can enter in a night club, and if you can teach your friend to drive:

• Function: a named section of a program that performs a specific task. Realized that "sum", "length" and "times" is a function
• Study the basic command to create a function:
  • function to add any two numbers:

• Based on 32, created a function that adds two numbers called "add_numbers".
• Use your "add_numbers:
• Create a new function, that multiply 2 numbers, and use it
• Create a function that transform years in days
• Create a function that check if a number is above or bellow 1814
• Create a function that receives a vector and display all the elements of this vector
• Create a function that calculates sigma for a cantilever given your P, L and h
• Create a function calculate the area (I) between two points (a,b) by the trapezoidal rule:

• Create matricesd,eandfby concatenatingvectorsa,bandc:

• Consider the a = 2, b=4, c=6, d=9 and calculate 2A in MATLAB given :

• Consider ? = pi/6, m=4, n=2, calculate the value of [m,n] for:

• Solve the problem from 1st day, calculating how much sales the shop makes on each day in matrix operations:

Matrix multiplication example:
Beef pies cost $3 each
Chicken pies cost $4 each
Vegetable pies cost $2 each They are sold in 4 days

the value of sales for Monday is calculated as:
Beef pie value + Chicken pie value + Vegetable pie value
= $313 + $48 + $26 = $83
= ($3, $4, $2) (13, 8, 6) = $313 + $48 + $26 = $83

• Create a multi-dimensional matrix based on the figure below:

• Obtain the following plot:

• Obtain the similar curving fit data using polyfit and polyval:

• Obtain the following 3D plot:

• Define a meshgrid and plot the following

• Plot the following 3D curves using theplot3function

• Plot the following 3D curves using thesurffunction Sine surface

• Describe each part from the trapezoidal

• Remind about differential equations, andhow

• Using the trapezoidal function plot and integrate (0-pi/2) for f(x) = sen(x) and f(x) = cos(x)

• Using the trapezoidal function plot and integrate the number of passengers

• Plot the bell-shaped function f(x), x range [0,1], varying?in [1.5, 2, 4, 9 ]

Using the trapezoidal function, calculate the area from the range x [0.2, 0.8] for all four ?

• Plot the following solids in revolution (cylinder) function and calculate its volume

• Design a group of cranes, varying square cross section and load for L = 3m. Check if cranecollapses (?max = 250MPa)

• Giving the cities represented by letters A to F, and the distance among them represented by the value in the connecting line, calculate the shortest order tovisit ALL the cities

• Sketch a problem of your own which you thinkthat MATLAB can help to solve

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