MATLAB: I am trying to get emg and force data simultaneously using parallel computing tool box but i am unable to read the data??

Question

i am using the below code

if matlabpool('size') == 0

        matlabpool open local 2
data1=zeros([122880,2]);
data2=zeros([37000,1]);

spmd

    switch labindex
        case 1
           s = daq.createSession('ni');
s.addAnalogInputChannel('cDAQ2Mod1', 0, 'Voltage');
s.addAnalogInputChannel('cDAQ2Mod1', 1, 'Voltage');
s.Rate = 2048
s.DurationInSeconds = 60;
labBarrier
[data1,time] = s.startForeground;
 case 2
          delete(instrfindall);
s = serial ( 'COM5', 'BaudRate', 115200);
set(s, 'Timeout',60);
s.InputBufferSize =37000;
labBarrier
fopen(s);
data2=fread(s);  
    end

end

end

matlabpool close

my workspace is containing data in composite form

data1 composite

data2 composite

is there any way to solve this problem???

Answer 1

The data contained within a Composite is retained on the workers. Therefore if you close the pool, the data goes away. So, you simply need to avoid closing the pool until you've got the data from the workers. One way to do this would be:

data1 = data1(:);
data2 = data2(:);
matlabpool close

Or, you could simply leave the matlabpool open.