How to extract specific rows from an array

[Fluciano2]

Hello!

I’m trying to make a programme which, given a 2-dimension array, returns a 2- dimension array which contains only the rows having “1” as the first value.

 

The problem is that I can’t tell the case structure to “do nothing” in case he encounters a “0”, so he gives me this output:

 

How can I write that in order not to have those “0; 0” lines on the A2? 

Alternatively, could I write it so that it splits the A1 into two arrays: A2 (only made up of rows starting with “0” ) and A2 (only with rows starting with “1”)?

Thank you for your attention

Francesco

[GerdW]

Hi Francesco,

learn about all those different tunnel modes:

The problem is that I can’t tell the case structure to “do nothing”

For that use case you need to learn about shift registers…

[Fluciano2]

Hi GerdW;
thank you for your reply.

I read about shift registers and tried to use them; I understood that they can be used to pass data between iterations but still I don't understand how to use them to do nothing during a single iteration.

[crossrulz]

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@Fluciano2 wrote:

but still I don't understand how to use them to do nothing during a single iteration.

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Just pass the values from the shift register straight through the case.  It is all about data flow.