Monday, March 20, 2017

Week Ten

Not Shocking People Whilst Using MATLAB

Week Ten

%1 
clear all;
close all;
x = [1 2 3 4 5];
y = 2.^x;
plot(x, y, 'LineWidth', 6)
xlabel('Numbers', 'FontSize', 12)
ylabel('Results', 'FontSize', 12)

clear all; %2 clear all removes prior variable and function definitions

close all; %3 closes any prior command based windows (i.e. plot, ext.)

x = [1 2 3 4 5]; 

y = 2.^x;

plot(x, y, 'LineWidth', 6)

xlabel('Numbers', 'FontSize', 12)

ylabel('Results', 'FontSize', 12)

%4 when typing x and pressing enter, the prior logged values for x appear
%the matrix has one row and five colomns.

%5 the semicolon is used when defining the function, which without it, would
%the values would not be stored and the plot function nor defined

%6 If a . is not used before the power, the x values will be read as a whole
%matrix instead of being recognized individually.

%7 It affects the thickness of the line that is plotted

%8
clear all; 
close all; 
x = [1 2 3 4 5];

y = 2.^x;

plot(x, y, '-rO','LineWidth', 5,'markersize',18)

xlabel('Numbers', 'FontSize', 12)

ylabel('Results', 'FontSize', 12)



%9
clear all; 
close all; 
x = [1; 2; 3; 4; 5;];

y = 2.^x;

plot(x, y, '-rO','LineWidth', 5, 'markersize',18)

xlabel('Numbers', 'FontSize', 12)

ylabel('Results', 'FontSize', 12)



%The plot stays the same, as these colons are already expressed when the .
%is placed before the ^

%10
clear all; 
close all; 
x = [1 2 3 4 5];

y = 2.^x;

plot(x, y, ':ks','LineWidth', 6, 'markersize',14)
grid on
xlabel('Numbers', 'FontSize', 12)

ylabel('Results', 'FontSize', 12)



%11
%a : on google calculator
%sin(30)=0.5

%b
%sin(30) = -0.9880
%They are differenct because google automatically calculates sin using
%degree values inside the parenthesis, whereas when in MATLAB, sin(x) is a
%radian command, while sind(x) is using degrees

%c
%sind(30) = 0.5000

%12
clear all;
close all;
t = linspace(0,0.12,10);
y = 10*sin(100*t);
u = linspace(0,0.12,1000);
z = 10*sin(100*u);

plot(t,y,'-ro')
hold on
plot(u,z,'-k')

xlabel('Time(s)')
ylabel('y function')
legend('Course','Fine')



%13 
%Differences: Two plots were formatted atop one another using the hold on
%command, the variables were defined using intervals of range of values,
%there was a legend added.

%14
clear all;
close all;
t = linspace(0,0.12,10);
y = 10*sin(100*t);
u = linspace(0,0.12,1000);
z = 10*sin(100*u);
f=find(z>5)
z(f)=5
plot(t,y,'-ro')
hold on
plot(u,z,'-k')

xlabel('Time(s)')
ylabel('y function')
legend('Course','Fine')


PART B
1.

2.
%PART B
%2

clear all;
close all;
f=[.1 .2 .3 .4 .5 .6 .7 .8 .9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2]
v=[3.25 3.82 3.66 3.58 3.5 3.4 3.3 3.2 3.07 2.96 2.85 2.75 2.63 2.53 2.45 2.35 2.28 2.2 2.12 2.05]

plot(f,v,'-ro')

xlabel('frequency(KHz)')
ylabel('V out(V)')
grid on


3.
fc= 1/(2*3.141593*7500*0.000000022)
fc =

  964.5753

%The voltage at 965 is 3

clear all;
close all;
f=[.1 .2 .3 .4 .5 .6 .7 .8 .9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2];
v=[3.25 3.82 3.66 3.58 3.5 3.4 3.3 3.2 3.07 2.96 2.85 2.75 2.63 2.53 2.45 2.35 2.28 2.2 2.12 2.05];
c=find(v>3)
v(c)=3
plot(f,v,'-ro')

xlabel('frequency(KHz)')
ylabel('V out(V)')
grid on


%4
clear all;
close all;
f=[.1 .2 .3 .4 .5 .6 .7 .8 .9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2];
v=[3.25 3.82 3.66 3.58 3.5 3.4 3.3 3.2 3.07 2.96 2.85 2.75 2.63 2.53 2.45 2.35 2.28 2.2 2.12 2.05];
c=find(v>3)
v(c)=3
plot(f,v,'-ro')
hold on
y=[.1 .2 .3 .4 .5 .6 .7 .8 .9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2];
u=[3.25 3.82 3.66 3.58 3.5 3.4 3.3 3.2 3.07 2.96 2.85 2.75 2.63 2.53 2.45 2.35 2.28 2.2 2.12 2.05];
plot(y,u,'--k')
legend('output with cutoff','output')

xlabel('frequency(KHz)')
ylabel('V out(V)')
grid on

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