Epoch unix to date

[cjb312 (Chris)]

I'm trying to convert 1422083623.329786 to a format like 1-24-2015 7:13:43.329

I've been looking it up through some past posts but I'm pretty lost. My current grok filter for it is
%{NUMBER:ts}

Thanks in advance

[Badger]

You can convert it to a timestamp using

date { match => [ "timeStamp", "UNIX" ] }

If instead you want it as a string in a particular format you could do that too.