Classification error analysis tool?

[Siddharth Mohan]

Hi, 

Is there a script/tool available for analyzing classification error? For eg: in imagenet, if I want to analyze 

1. which classes are more often in error and 

2. how these classes are mis-categorized. (histogram of mis classification). 

I wanted to ask the community before writing a new python script. 

Thanks,

Siddharth