Well first off, how are you connecting the thermister to your computer? DAQ card?
The data you would be getting from the thermister would be a voltage most likely. LabVIEW can, with the appropriate hardware, interpret that voltage as a temperature, but not without the connecting hardware.
What you're proposing would be very easy using the DAQ(mx) vi's that ship with LV, however in order to propose a solution we could help you out with, we'd need to know how you're interfacing to the computer.
Geoff