Hello.
I am assuming you have the LabVIEW data in an array (if you have it in a waveform, then you have to extract the data array from it). The image of the simple code attached shows how to save the data in a format that Matlab can load. This case is for a 2D array because I was aquiring data from several channels.
Let's say that you save the data to a file named data.dat, then in Matlab you use the command "load data.dat", and the Matlab variable "data" will contain the 2D array you had in LabVIEW.