Decision Tree Null values

KNIME Analytics Platform
1

Hi,

I am trying to see percentage of null values in decision tree algorithm.

I can use replace like 'null' and i can see in string values but integer values seeing missing values or changing integer to string.

I want to see percentage of null values for all columns in decision tree algorithm. It must be like the attachment.

How can i do it? 

2

I would suggest to replace those missing values indicated by "?" with "null" or "missing" -- they are then treated as real values and visible in the dec tree.

3

Thank you for your suggestion.

You are right but it will solve for string values.

For integer values, if i replace "?" with "null" all int variables change to string variable.