Get array size in Simulink

Hello,

I would like in Simulink have a block with an array as parameter. This array could have various size. In this code, I want to extract a specific element.

I tried to do this with a selector block to select the desired element and a size "Matlab function" to avoid an out of bounds conflicts.

However, the selector block needs to specify the input port size (wich is not always the same). Moreover, for example, for an array [10 12 17 20], how to extract the 4 from the 1x4 result of the size command?

Any idea?

[Azzi Abdelmalek]

Can you specify where your array is coming from. Is it an output of another block or it's just an input to other blocks. Is your array size changing during simulation?

Answer 1

[Sachin Ganjare]

You can use 'Width' block from simulink library.

Hope it helps

[Shankar Santhosh]

Is there any alternate method to find the size than using 'width' block?

Because I have a requirement to create the model in Targetlink and not all Simulink blocksets are supported(especially this width block).

Answer 2

[Thomas LE DIOURON]

Thanks for this answer. With the help of this block and the "select rows" block, I have all that needed.

Answer 3

[javad sh]

I also used this method and found it useful\

I am reading from a serial port and i needed to know the length of massage that i am reading

now the problem that i have is this block will overflow if it become more than 255 what can we do when we have more than 255 byte to analysis

thank you for reply

fazareh

[Ali Bars Gunduz]

You can use demux block to divide your array into 255 element arrays and compute each arrays lengths