Geneos - 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 (slow on xpath evaluation):
   //rows/row/cell[(@column="usedInodes")]
   
   Sample absolute (full) path (fast on xpath evaluation):
   /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")]
   
   More about xpath slow and fast evaluation here - https://support.itrsgroup.com/hc/en-us/articles/115004022725-How-do-I-avoid-expensive-XPaths-that-slow-down-my-console-and-Gateway 

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