Here is extract from Help:
Wire a 2D array data type to the chart, right-click the chart, and select Transpose Array from the shortcut menu to treat each row in the array as a single plot.
Doesn't work. There is error in this instruction.
Solution: instead of right-click on Waveform chart one should insert Transpose Array block between Build Array block and Waveform chart.
No, the help is correct, when you wire a 2D array to the waveform graph, you can transpose it from the shortcut menu as follows:
Ticking/unticking that option has the same effect as putting a Transpose 2D array before wiring your array into the waveform chart.
I've tried on Block Diagram - there is no such option on Waveform chart context menu.
One more trap of LabVIEW - context menu changes depending on where it is called - in BlcokDiagram or in Front panel.
You could use "build waveform" for each of the 1-d arrays. make sure you set the "dt" to the right value and THEN build an array of the two WFs. present that to the chart.