Q:

Is it possible to create a signal in LTSpice by using a stored data?

I have lots of sampled voltage signals data where I can plot them in MATLAB or write them to a text file for each sample.
I would like to use these samples to generate input signals in LTSpice instead of trying to mimic them.
Is it doable in LTSpice?
edit: My data samples on txt can be in the following format:
59.7435           5.0615
59.7437    5.0578
59.7440    5.0768
59.7443    5.1119
Where the first column is time stamps in seconds, and the second column is corresponding sampled voltages

A:

If you can format the matlab data as a series of timestamps and levels  you can use the PWL file option for a voltage or current source. 
http://www.linear.com/solutions/1814

