# How to do this vector operation in MATLAB ?

1. May 10, 2013

### dexterdev

Hi friends,
I wanted a help in Matlab programming. I have some vectors as below :

d4=cos(2*pi*293.665*(0:1/44100:.25));
f4=cos(2*pi*349.228*(0:1/44100:.25));
e4=cos(2*pi*329.628*(0:1/44100:.25));
g4=cos(2*pi*391.995*(0:1/44100:.25));
c5=cos(2*pi*523.251*(0:1/44100:.25));
bb4=cos(2*pi*466.164*(0:1/44100:.25));
a4=cos(2*pi*440*(0:1/44100:.25));
c4=cos(2*pi*261.626*(0:1/44100:.25));

and finally a vector x build from the above vectors :

x=[c4 c4 d4 c4 f4 e4 c4 c4 d4 c4 g4 f4 c4 c4 c5 a4 f4 e4 d4 bb4 bb4 a4 f4 g4 f4];

here a4 must be assigned 1, bb4 - 2, c4 - 3, d4 - 5, e4 - 6 , f4 - 7 and g4 - 8. I wanted to create a vector y from x. y must be as below :

y = [3 3 5 3 7 6 3 3 5 3 8 7 3 3 4 1 7 6 5 2 2 1 7 8 7] ;

TIA

2. May 11, 2013

### kreil

Some more information would help here. Based on what you've written it looks like typing in that vector works just fine, given that you want to take a vector with 275k+ elements and turn it into one with 25.

3. Jun 5, 2013

### RacingFan

Track representation in Matlab

Hi,

I was wondering if anyone could help me. I need to simulate a race track using matlab and do not know how to go about this?

Any suggestions welcome.

Thank you

4. Jun 5, 2013

### kreil

RacingFan, start a new thread and include as much information as possible on the problem,as well as what you've tried already.

5. Jun 6, 2013

### RacingFan

How do i start a new thread? sorry new to this!

6. Jun 6, 2013