Failure in look-up table / failure in my matlab

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Benedikt 2013-11-19

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评论： Benedikt 2013-11-19

Hello,

i have a question about the look-up table function "fixpt_interp1" in matlab. I tried to run the code which is offered in the help section. (See attached m-file). I get no errors but:

By my opinion, the code itself is fine, but it is working wrong in my computer. I get the wrong results (see attached figure). By wrong i mean i expected a sine-output and not the "ramps" i get.

So my exactly question is: What is wrong with my matlab installation?

I use win7 64bit with matlab 2013b (also 64bit). I tried the same code with the same results with matlab 2012b. I even deleted java and all matlab version and reinstalled (java and matlab) with the same result.

regards Benedikt

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Answer 1

Simon 2013-11-19

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Hi!

The help uses sfix(8) instead of ufix(8) and another scaling: fixpt_interp1

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Simon 2013-11-19

Sorry, I have no Simulink, I just noticed the differences between your code and the online help. Maybe the help shipped with your version is wrong and it was fixed in the online version ...

Benedikt 2013-11-19