MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn moreOpportunities for recent engineering grads.

Apply Today
Asked by Owen on 15 Nov 2012

Hello,

can anyone show me how to convert a 10x1 vector into 10 scalars with an Embedded Matlab Function?

I just don't know how to upsample the incoming vector, that is, the sample frequency at the output must be 10 times greater than at the input.

Thanks Senmeis

Answer by Kaustubha Govind on 15 Nov 2012

Accepted answer

Are you attempting to use the Embedded MATLAB Function block to perform upsampling? If so, I don't think that is possible, because the Embedded MATLAB Function block runs at an "inherited" sample-time, which means that the output must have the same sample rate as the input. It looks like what you really need is an Unbuffer block.

Kaustubha Govind on 15 Nov 2012

Sure, you have a lot of flexibility with S-functions, so you should be able to use them too.

Answer by Azzi Abdelmalek on 16 Nov 2012

Edited by Azzi Abdelmalek on 16 Nov 2012

You can use a **Demux** block from **Simulink/Signal Routing**. At the output of Demux you will have 10 scalar at the same time. If you want them one after one, add an **Index Vector** block.

look at the use of Index Vector at http://www.mathworks.com/matlabcentral/answers/53615-how-can-i-convert-a-raw-matrix-into-a-sequence-of-digits

Show 2 older comments

Owen on 19 Nov 2012

I've tried Demux block and I'm afraid it cannot be used with variable-sized data.

Senmeis

Azzi Abdelmalek on 19 Nov 2012

Ah, I did'nt understand, I confused with variable step size. Then try Kaustubha's suggestion, you will need a communication system toolbox

Kaustubha Govind on 19 Nov 2012

Azzi: I didn't recommend Demux block originally because Owen wants to effectively "upsample" (or Unbuffer) the signal.

## 0 Comments