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