I need to plot a lot of data from an Excel file. I would like to plot one column of data (flow rate) against the left y-axis and have two columns of data (pressure drops) against the right y-axis. How do I do this?
I thought I could work it out using the help pages, but I have no idea how to code the data. I am importing it from Excel and plotting instead. At the moment the plot looks ridiculous because it is plotting it all against the left y-axis and the values for the pressure drops are small compared to the flow rate.