[Declare Variables] #matlab #math

variables.mat

//Declaring & Assigning variables
a = 1
b = 2
c = 3

//Clearing Variables
clear a b
clear

//Row vector
v1 = [ 1 2 3]

//Column vector
v2 = [ 1; 2; 3]

//Access vector element
v1(1)

//Vector uniformly spaced
v3 = 0:6
[0,1,2,3,4,5,6]

v4 = 0:0.5:6
[0,0.5,1.0....,6]

theta = -2*pi:pi/10:2*pi;

//Switch row to column and vice versa
v2 = v2'
v4 = (0:0.5:6)'

//2D Matrix
z = ones(3,4)
z =

     1     1     1     1
     1     1     1     1
     1     1     1     1

z = ones(3,4)
z =

     0     0     0
     0     0     0
     0     0     0
     0     0     0

//Size
size(z)
ans = 4     3

size(theta)
ans = 1    41

//Allocate new vector
zeros(size(theta))

//Generate 20 normally distributed random numbers with a mean of zero and standard deviation of 1
randn(20,1)
z = y + 0.3*randn(size(theta));

//Plot
plot(y)

//Plots theta in the x axis & y in the y axis
plot(theta,y)

//Plot over an existing plot
hold on
plot(theta,z)
xlabel('Phase (radians)')
ylabel('Amplitude')
title('Ideal vs. Noisy Oscillations')
legend('Ideal','Noisy')

//Save variables in the workspace
save myData theta y z