[R-sig-Geo] Cumulate space time data over days

[pierluigi de rosa]

Dear all,

I'm have a simple question that I think should be easly to answer but I'm
an R beginner anf I didn't find nothing exactly what I need.

I have a STFDF that register rainfall data over 14 years in 30 monitoring
stations.
I need to evaluate for each day the cumulative rainfall of the 3 days
before (or 72 hours) and than extract data where this cumulative value is
above a threshold.

How ca I reach that?
Thanks

Summary of my data is below
Thanks
Pierluigi

> summary(pioggieST1)
Object of class STFDF
 with Dimensions (s, t, attr): (30, 8401, 1)
[[Spatial:]]
Object of class SpatialPointsDataFrame
Coordinates:
              min     max
coords.x1 2272679 2320496
coords.x2 4698989 4821088
Is projected: TRUE
proj4string :
[+proj=tmerc +lat_0=0 +lon_0=15 +k=0.9996 +x_0=2520000 +y_0=0 +ellps=intl
+units=m +no_defs]
Number of points: 30
Data attributes:
                nome
 Allerona         : 1
 Amelia           : 1
 Attigliano       : 1
 Avigliano_Umbro  : 1
 Bastardo         : 1
 Calvi_dell_Umbria: 1
 (Other)          :24
[[Temporal:]]
     Index              timeIndex
 Min.   :1991-01-01   Min.   :   1
 1st Qu.:1996-10-01   1st Qu.:2101
 Median :2002-07-02   Median :4201
 Mean   :2002-07-02   Mean   :4201
 3rd Qu.:2008-04-01   3rd Qu.:6301
 Max.   :2013-12-31   Max.   :8401
[[Data attributes:]]
     values
 Min.   :  0.000
 1st Qu.:  0.000
 Median :  0.000
 Mean   :  1.489
 3rd Qu.:  0.000
 Max.   :273.000


-- 
Ing. Pierluigi De Rosa (PhD)
cel: 3497558268 / fax: 075 7823038
skype: pierluigi.derosa

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