identify the plottable data

[prjemian]

• close #80

[prjemian]

• count with one entry should not be charted
• except for area detector images
• misidentifies some handling of area detector images in scan plan

[prjemian]

Simple example: rel_scan

=============== ===========
item            description
=============== ===========
scan            995        
plan            rel_scan   
chart           line_1D    
stream          primary    
plot signal     noisy      
plot axes       m1         
all detectors   noisy      
all positioners m1         
=============== ===========

grid_scan

=============== ========================================================================================================================================================================================================================================
item            description                                                                                                                                                                                                                             
=============== ========================================================================================================================================================================================================================================
scan            1010                                                                                                                                                                                                                                    
plan            grid_scan                                                                                                                                                                                                                               
chart           scatter_2D                                                                                                                                                                                                                              
stream          primary                                                                                                                                                                                                                                 
plot signal     noisy                                                                                                                                                                                                                                   
plot axes       m9, m10                                                                                                                                                                                                                                 
all detectors   noisy, temperature_setpoint, temperature, temperature_done, temperature_calculation, temperature_description, temperature_max_change, temperature_noise, temperature_previous_value_pv, temperature_scanning_rate, temperature_tolerance
all positioners m9, m10                                                                                                                                                                                                                                 
=============== ========================================================================================================================================================================================================================================

grid scan with area detector

=============== ===================================================================
item            description                                                        
=============== ===================================================================
scan            386                                                                
plan            grid_scan                                                          
chart           scatter_2D                                                         
stream          primary                                                            
plot signal     adsimdet_image                                                     
plot axes       m1, m2                                                             
all detectors   adsimdet_image, timebase, I0, scint, diode, I000, I00, scaler1_time
all positioners m1, m2                                                             
=============== ===================================================================