Terminating some Simulink samples

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Jim Clay 2012-11-27

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I have a serial stream of samples in my Simulink model and I would like to be able to "terminate" the first N samples. Is there a way to do that?

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Answer 1

Babak 2012-11-28

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this is how I would do it:

I would put a clock block (in Simulink sources library) and connect it to a "compare to constant" block (in Simulink logic and bit operations library).

This way you can compare the time with any number you choose and you will get a 0 or 1 out of the compare to constant block. Knowing what is your smpling time, you can conver, comparing the clock (time) with a constant to comparing the sample number with a constant just by dividing time out of clock with sampling time which can be found in the "Weighted Sample Time" block (in simulink Signal attributes library)

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Ilham Hardy 2012-11-28

"Switch" block?

Babak 2012-11-28

It depends on what blocks your model includes.

For example you can multiply that 0/1 signal with any signal you want like signals coming out of a source block. This way the source result will be zero for specific sampling times.

Or you can use a switch block as Ilham mentioned. This way you can feed the 0/1 signal to the middle inport signal of the switch block and put your other signals on the other inports of that.

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