slicing a time series for training a neural network.

The data for this time series in the figure were extracted from a simulink simulation. These data will be used for training a neural network and then I will create a block diagram of this neural network in simulink using the command "gensim". The problem that I cannot extract the time column (the matrix slicing commands do not seem to work in time series) for training the naural network. If anyone can help me extract this column or have a simpler solution for integrating simulink and neural network, I appreciate it.