Online data display and aquisition

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

Answer 1

[Rajiv Ghosh-Roy]

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.