How to subtract one field value from another field value for each event?

[sim_tcr]

Hello,

We have two fields: elapsedMs and backendServiceMillis. Both have only numeric values.
How can we display a new field which has the result of elapsedMs - backendServiceMillis?

Thanks,
Simon Mandy

[sim_tcr · Accepted solution]

I figured out myself.
| eval difference = elapsedMs - backendServiceMillis | table elapsedMs backendServiceMillis difference