Excel spreadsheet expert to create trend and origin graphs from surveying data or computer coders

We need a Freelancer who can handle variable sets of data which contain XY and Z data. The number of sets changes from time to time and may be XY or Z or XYZ. The excel spreadsheet sheet graphs must be able to show if a data set wasn't present. We compare this data to baseline data for monitoring and are required to produce charts and graphs. Must be able to import csv files along with manual data