1. EGR 115 Introduction to Computing for Engineers
2D Plotting – Part II
Lecture 11
EGR 115 Introduction to Computing for Engineers

2. EGR 115 Introduction to Computing for Engineers
Lecture Outline
Annotation of Plots
Polar, Bar, Pie, … Plots
Lecture 11
EGR 115 Introduction to Computing for Engineers

3. 2D Plotting Annotation of Plots
Plot 𝑦 𝑡 =10 𝑒 − 𝑡 𝜏 sin 𝜔 𝑡 :
Plot limits should be 0<t<2𝜋 (in sec) for the 𝑥-axis and −10<𝑦< 10 for the 𝑦-axis.
Overlap three different plots, one for each of 𝜏= 1, 3, 10 .
Angular velocity is 𝜔=3 rad/sec.
Include the function definition in the legend.
Include axis labels and a title
Turn on grid lines
Colors as shown
Publish as ‘Quiz2_Last_First.docx’
Upload to hwk#3
Lecture 11
EGR 115 Introduction to Computing for Engineers

4. 2D Plotting Annotation of Plots
Editing a Plot
Click on “Edit Plot”
Right click on the red line and make it dashed
Click on the “Show Plot Tools” (far right) icon
Select an item in the plot window to see properties of that item.
Change the location of the legend to be the lower left corner
Lecture 11
EGR 115 Introduction to Computing for Engineers

5. 2D Plotting Additional 2D Plots
A Vertical Bar Graph:
MATLAB Code:
%% An in class example of Additional Plots
x=[ ];
y = 10 * rand(1, length(x));
% Bar Plot
figure
bar(x,y)
title('Example of a Vertical Bar Plot')
xlabel('x')
ylabel('y') …
Lecture 11
EGR 115 Introduction to Computing for Engineers

6. 2D Plotting Additional 2D Plots
A Horizontal Bar Graph:
MATLAB Code:
barh(x,y)
title('Example of a Horizontal Bar Plot')
xlabel('y')
ylabel('x')
Lecture 11
EGR 115 Introduction to Computing for Engineers

7. 2D Plotting Additional 2D Plots
A Stem Graph:
MATLAB Code:
stem(x,y)
title('Example of a Stem Plot')
xlabel('x')
ylabel('y')
Lecture 11
EGR 115 Introduction to Computing for Engineers

8. 2D Plotting Additional 2D Plots
A Stair Graph:
MATLAB Code:
stairs(x,y)
title('Example of a Stair Plot')
xlabel('x')
ylabel('y')
Lecture 11
EGR 115 Introduction to Computing for Engineers

9. 2D Plotting Additional 2D Plots
A Compass Plot:
MATLAB Code:
compass(x,y)
title('Example of a Compass Plot')
xlabel('x')
ylabel('y')
Lecture 11
EGR 115 Introduction to Computing for Engineers

10. 2D Plotting Additional 2D Plots
A Pie Graph:
Explain the percentages in the chart
pie(y)
title('Example of a Pie Plot')
Lecture 11
EGR 115 Introduction to Computing for Engineers

11. 2D Plotting Additional 2D Plots
An Exploded Pie Graph:
explode = [ ];
pie(y, explode)
title('Example of an Exploded Pie Plot')
Lecture 11
EGR 115 Introduction to Computing for Engineers

12. 2D Plotting Additional 2D Plots
Generate a plot of (i.e., plot(x, y)):
y= 2 − 𝜙 2𝜋 𝑆𝑖𝑛 𝜙 vs 𝑥= 2 − 𝜙 2𝜋 𝐶𝑜𝑠 𝜙 , for 0≤𝜙≤2𝜋
When 𝜙=0 => y = ? and x = ?
Reproduce the same as a polar plot:
polarplot(theta, r)
What is the expression for r and what is  ?
Recall that: 𝑥+𝑖 𝑦=𝑟  𝑒 𝑖𝜃
MALAB CODE
Lecture 11
EGR 115 Introduction to Computing for Engineers

13. EGR 115 Introduction to Computing for Engineers
Next Lecture
Designing The Sudoku Game in MATLAB
Lecture 11
EGR 115 Introduction to Computing for Engineers