# [gradsusr] How do I know which time step in max(xx, t=x, t=y) is actually the max?

Stephen McMillan smcmillan at planalytics.com
Thu Jun 26 10:50:53 EDT 2014

```Robert,
Use the function maxloc, e.g., maxloc(temp,t=1,t=6).  If lat and lon are
fixed, it should return a single value with the time step.  If lat and lon
are not fixed, it should return a spatial map with the max temp time step
at each grid point.

Documentation in GrADS Index, but has no examples.

Stephen McMillan

On Thu, Jun 26, 2014 at 10:20 AM, Roberto Mera <RMera at ucsusa.org> wrote:

>  All,
>
>  I'm trying to figure out a way to output the maximum temperature and RH
> in a 5-day period for a month in a superensemble.
>
>  I can get the max to write out using this function:
>
>  count = 1
> while (count < 18)
> 'set e 'count
>
>  'd areal'
> areal=subwrd(result,4)
>  say areal
> if (rc != 0) ; break ; endif
> count = count +1
> endwhile
>
>
>  However, if I also want the CONCURRENT RH, then I have to know which
> time step was the max for the temperature. Otherwise it might be a
> different time step if I do max(rh,t=1,t=6).
>
>  Is there a way to query which t in the max(temp,t=1,t=6) is the actual
> max? i.e. timestep 3. This way I can put it in a new script and get the
> appropriate rh.
>
>  Robert
>
> _______________________________________________
>
>

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