Particular aggregating a monthly series to quarters starting inįebruary does not give a conventional quarterly series.įUN is passed to match.fun, and hence it can be aįunction or a symbol or character string naming a function. The original series covers a whole number of quarters or years: in Note that this make most sense for a quarterly or yearly result when the cells with data are not contiguous and have NA values scattered throughout). Series with frequency nfrequency holding the aggregated values. Aggregate raster in R with NA values Ask Question Asked 9 years, 3 months ago Modified 9 years, 3 months ago Viewed 2k times Part of R Language Collective 2 I have a 1km resolution raster in R with widespread NA values throughout, but at irregular locations (i.e. Then, the variables in x are split intoĪppropriate blocks of length frequency(x) / nfrequency, andįUN is applied to each such block, with further (named)Īrguments in … passed to it. If x is not a time series, it isĬoerced to one. (Note that versions of R prior to 2.11.0 requiredĪggregate.formula is a standard formula interface toĪggregate.ts is the time series method, and requires FUN Missing values in any of the by variables will be omitted from Lists of summary results according to subsets are obtained. Raster data divides space into cells (rectangles pixels) of equal size (in units of the coordinate reference system). True, summaries are simplified to vectors or matrices if they have aĬommon length of one or greater than one, respectively otherwise, Description The raster package provides classes and functions to manipulate geographic (spatial) data in 'raster' format. The ones arising from x the corresponding summaries for the The ones arising from by contain the uniqueĬombinations of grouping values used for determining the subsets, and Reformatted into a data frame containing the variables in byĪnd x. With further arguments in … passed to it. The input is a raster function JSON object or an. Split into subsets of cases (rows) of identical combinations of theĬomponents of by, and FUN is applied to each such subset A custom raster function that will be used to compute the pixel values of the aggregated rasters. Then, each of the variables (columns) in x is Not a data frame, it is coerced to one, which must have a non-zero To a data frame and calls the data frame method.Ī is the data frame method. Method if x is a time series, and otherwise coerces x The default method, fault, uses the time series i forĪggregate is a generic function with methods for data frames Unnamed grouping variables being named Group. Non-empty times are used to label the columns in the results, with Valueįor the time series method, a time series of class "ts" orįor the data frame method, a data frame with columnsĬorresponding to the grouping variables in by followed byĪggregated columns from x. Further arguments passed to or used by methods.
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