How to compare cells on the same row

You need to create a rule that uses Path Alias with a Relative Path of the other cells (columns)

1. Create an additional column
   
2. Create a rule with a target as the path value of the entire newly added column
   

   You may use relative path on the target or the absolute (full) path
   Sample relative path:
   //rows/row/cell[(@column="usedInodes")]
   
   Sample absolute (full) path:
   /geneos/gateway[(@name="MNL_PUGO_GATEWAY_123")]/directory/probe[(@name="PUGO-NETPROBE")]/managedEntity[(@name="PUGO-MANAGED-ENTITY")]/sampler[(@name="disk_sampler")][(@type="")]/dataview[(@name="disk_sampler")]/rows/row/cell[(@column="usedInodes")]

3. Create path alias of the rows you want to compare
   

   Sample path aliases:
   Name: totalInodes
   text: ../cell[(@column="totalInodes")]
   
   Name: freeInodes
   text: ../cell[(@column="freeInodes")]

4. Create your rule
   

   Sample rule:
   set $(freeInodes) path "freeInodes" value
   set $(totalInodes) path "totalInodes" value
   value $(totalInodes) - $(freeInodes)

5. Output