Yes, When you read in the data column, convert it from string to serial date number if necessary (if it shows up as numeric in MATLAB then you need to add datenum('1900-1-1')-1 to it to do the date conversion.)
Once you have a numeric value for the three columns, you can use griddata() to build an array of rectangular data that you can then contour() -- or more likely, that you can imagesc()
