Hello Kallu, I was able to get my question answered. This worked for me:
index=_internal sourcetype=splunkd eps > 0 | addinfo
| eval date_wnum=strftime(_time, "%V")
| eval date_wnum_now=strftime(info_max_time, "%V")
| eval _time=_time+(date_wnum_now-date_wnum)*86400*7
| eval date_wnum=if(date_wnum==date_wnum_now,"This week",(date_wnum_now-date_wnum)." weeks ago")
| bin _time span=1h
| chart avg(eps) over _time by date_wnum
| makecontinuous _time
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