Polynomial models -- System identification toolbox

In the System Identification Toolbox, the Polynomial Models (ARX) "Order Selection" tool (which evaluates multiple models) doesn't work -- it always instantly returns with all models set to 100% variance.

This happens on both a linux and windows machine. Why might that be?

[José-Luis]

Minimum working example?

Answer 1

[Arkadiy Turevskiy]

What do you mean by 100% variance?

I just tried it in R2014a using example data set (Click on "Import Data" and select last option, "Example").

I get this:

so seems to work fine.

[John]

In 2013b, all the tool returns is a straight line across 100%. At first it says "estimated time remaining=1000s", and then instantly it finishes with no result. I can't submit a minimum working example without submitting data... But the base option of 1:10, 1:10, 1:10 and ARX is all I did.

[Arkadiy Turevskiy]

If you think something is wrong with the tool, please contact technical support.

[John]

Isn't a service contract required to contact Technical Support? I don't have one.

[Arkadiy Turevskiy]

If you license is not under service maintenance, I can still look into your issue, but to troubleshoot I need to be able to replicate it. You can either provide your data or make up the data that you can share that still exhibits the issue. Feel free to email the data directly to me if you do not want to post it here.

Answer 2

[nasir abbas]

 we want to estimate transfer function of boost converter from time domain data in system identification tools.is it possible?When i load time domain data in sys ident tools and click to estimate sys shows it is impossible to estimate time domain data