Parses an expression used arbitrary fixed probes. The expression uses the access functions V()
          and I() to denote node voltages and source currents respectively. The function provides a list of the
          access nodes and sources used in the expression. These are used to create an abritrary probe symbol.
        
        
            Arguments
        
        
            
                
                
                
                
                
                
                    
                        | 
                            
                                Number
                            
                         | 
                        
                            
                                Type
                            
                         | 
                        
                            
                                Compulsory
                            
                         | 
                        
                            
                                Default
                            
                         | 
                        
                            
                                Description
                            
                         | 
                    
                    
                        | 
                            1
                         | 
                        
                            string
                         | 
                        
                            Yes
                         | 
                        
                         | 
                        
                            Expression
                         | 
                    
                
            
        
        
            Argument 1
        
        
            Expression to be parsed using V(node) and I(source) access functions
        
        
            Returns
        
        
            Return type: string array
        
        
            
                
                    
                        
                            | 
                                
                                    Index
                                
                             | 
                            
                                
                                    Description
                                
                             | 
                        
                        
                            | 
                                }
                             | 
                            
                             | 
                        
                        
                            | 
                                0
                             | 
                            
                                Expression converted to a form useable by a fixed probe
                             | 
                        
                        
                            | 
                                1
                             | 
                            
                                Number of distinct nodes = nn
                             | 
                        
                        
                            | 
                                2
                             | 
                            
                                Number of distinct sources = ns
                             | 
                        
                        
                            | 
                                3 to 3+nn-1
                             | 
                            
                                Node names used
                             | 
                        
                        
                            | 
                                3+nn to 3+nn+ns-1
                             | 
                            
                                Source names used
                             | 
                        
                    
                
            
         
        
        
            See Also