README.md

01_ME3255_repo

Answer to Homework Question

I hope to learn how to perform MATLAB functions more easily.

#Problem 3

A_66=zeros(6:6);
for i=1:6;
    j=1:6;
    A_66(i,j)=i*j;
end
fprintf('mean of A_66 = %1.2f\nstdev of A_66 = %1.2f\n',mean(A_66(:)),std(A_66(:)))

Outputs:

mean of A_66 = 12.25

stdev of A_66 = 9.07

#Problem 4

data=dlmread('US_energy_by_sector.csv',',',2,0);
figure(1)
plot(data(:,1),data(:,3),data(:,1),data(:,9));
set(0, 'defaultAxesFontSize', 16)
set(0,'defaultTextFontSize',14)
set(0,'defaultLineLineWidth',3)
set(gcf, 'Position', [200, 200, 1000, 800])
xlabel('Time (years)')
ylabel('Total Energy Consumed (trillions of BTUs)')
legend('Residential','Transportation','Location','northwest')
title('US Energy Consumption from 1949 to 2016')


rescum=cumsum(data(:,3))./1000000;%cumulative sum of residential energy
%consumption in quintillions
transcum=cumsum(data(:,9))./1000000;%cumulative sum of transportational
%energy consumption in quintillions
figure(2)
plot(data(:,1),rescum,data(:,1),transcum)

set(gcf, 'Position', [500, 200, 1000, 800])
xlabel('Time (years)')
ylabel('Total Energy Consumed (quintillions of BTUs)')
legend('Residential','Transportation','Location','northwest')
title('Cumulative US Energy Consumption from 1949 to 2016')

#Problem 5 (Velocity and Acceleration)