Real time vector saving

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Stergios Verros
Stergios Verros 2016-9-30
回答： Brandon Eidson 2016-10-6
Dear all,
I am using xPC with R2014b version and in my model I have a state machine that in one state there is a function with two inputs coming from 2 sensors. I want to save all the values of the inputs into 2 vectors (eg. 10,1) that I will use in an other state.
Until now I used a persistent variable for the index for the vectors. My question is: how is it possible to save the 2 vectors and use them in the next state?
Bests, Stergios
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Stergios Verros
Stergios Verros 2016-10-3
To make it more clear, I want to make a polyfit from the 2 vectors, save the coefficients and then use them into an other state!

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Gareth Thomas
Gareth Thomas 2016-10-3
If I understand you correctly you have a stateflow chart, in which one state you are calculating some parameters for a polyfit and you want to send them to another state based on a particular condition.
Have you looked into Events in Stateflow? One can broadcast events with data to another states.
MathWorks Documentation
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Stergios Verros
Stergios Verros 2016-10-3
Thanks for that but my main question is one step before that.
I try to save the values in 2 vectors (1000x1) and polyfit in every cyrcle and at the last circle (before the condition) to save the coefficients. I use persistent variables but the xPC keeps giving a CPU overload. Would it be helpful to paste the code here?

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Brandon Eidson
Brandon Eidson 2016-10-6
Hey Stergios,
One way to save variables in one state that can be used in another state is by using the "Data Store Memory" block and its associated blocks. I have provided the link to its documentation below as well as a link to information on how to use this block in Stateflow.
http://www.mathworks.com/help/releases/R2016a/simulink/slref/datastorememory.html
https://www.mathworks.com/help/stateflow/ug/sharing-global-data-with-multiple-charts.html
Also, if you are using C for your Stateflow Action Language, note that the scope of variables can be handled differently. A list of some of the differences is found at the link below.
http://www.mathworks.com/help/stateflow/ug/differences-between-matlab-and-stateflow-action-language.html

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