Read .CSV File Created with Tektronix TDS2000

DATA = READ_TEKTRONIX_CSV(FILENAME) returns a struct as DATA with all parameters read from the file with FILENAME. Each parameter read from the file becomes a field in the struct, with the time and samples vectors stored as TIME and VALUES.
TIME and VALUES are converted and stored as double with STR2DOUBLE.

Setup parameters are converted to double if possible. If STR2DOUBLE returns NAN for a particular parameter, its value is stored as a string.

Example usage:
data = read_tektronix_csv('F0000CH1.CSV');
plot(data.time, data.values)
xlabel(data.Horizontal_Units)
ylabel(data.Vertical_Units)
title(data.Source)

Discover additional parameters with: fieldnames(data) or disp(data)

Notes: Spaces in setup parameters are replaced with underscores to form valid struct fieldnames.
Multi-channel captures are stored/read from separate files.

Tested with a TDS2000 series Oscilloscope.