pder
Syntax
pder(vectorFunction, parameter)
		
Description
			Suppose vectorFunction is in the form [x(t)   y(t)] and
			parameter = t. This function calculates 
			
			
		
		
Warning
This function probably only works when Vector Format is set to Rectangular (in Document Settings).
Parameters
vectorFunction
					A vector function in row matrix form. It must be at least 2 dimensional and only
					the first two elements will be used.
				
Return Value
The derivative in the description.