Online data display and aquisition

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Stefan
Stefan 2014-7-1
回答： Rajiv Ghosh-Roy 2014-7-2
Dear Mathworks-Team,
we want to monitor xPC on-line data with our own GUI and plot() function. We gather chunks of data (a vector of 50 doubles) with the SigIn-Block and try to read them out (at the moment we access the "Out" block.
The Matlab-Code does the following:
ids='Piezosteuerung/SigIxi/Out'
id = getsignalid(tg, ids)
variable = tg.getsignal(id)
What happens now is that we do not get the entire vector, but only the first element. So we made some construction like
for (i = 1:bufsize)
variable(i) = tg.getsignal(i+id)
end
It works, however, but I cannot imagine that this is the way to solve the problem. How can we get a vector with the last bufsize elements into Matlab to display them?
Thanks for your help,
Stefan

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回答（1 个）

Rajiv Ghosh-Roy
Rajiv Ghosh-Roy 2014-7-2
If you are looking to get time histories of data, you will need to use a host scope block. This can store a buffer of data. When the buffer is full, you can upload the buffer and then restart the scope.

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