lucC_extract_frequency: Categorical frequency from a list of data.frames

In ammaciel/lucCalculus: Land Use Change Calculus

Description

Provide a data.frame with count of categorical variables from a list of data.frame derived of processing with many blocks of RasterBricks

Usage

lucC_extract_frequency (data_mtx.list = NULL, cores_in_parallel = 1)

Arguments

data_mtx.list	Matrix. A list of matrix with values obtained from predicates RECUR, EVOLVE, CONVERT or HOLDS for each block of RasterBrick
cores_in_parallel	Integer. Number of cores to use, in other words the amount of child processes will be run simultaneously. Default is 1 core, that means no one parallelization.

Value

Data frame with statistical measures

Author(s)

Adeline M. Maciel

Examples

## Not run: 
library(lucCalculus)

file <- c(system.file("extdata/raster/rasterSample.tif", package = "lucCalculus"))
rb_class <- raster::brick(file)
my_label <- c("Degradation", "Fallow_Cotton", "Forest", "Pasture", "Soy_Corn", "Soy_Cotton",
              "Soy_Fallow", "Soy_Millet", "Soy_Sunflower", "Sugarcane", "Urban_Area", "Water")
my_timeline <- c("2001-09-01", "2002-09-01", "2003-09-01", "2004-09-01", "2005-09-01",
                 "2006-09-01", "2007-09-01", "2008-09-01", "2009-09-01", "2010-09-01",
                 "2011-09-01", "2012-09-01", "2013-09-01", "2014-09-01", "2015-09-01",
                 "2016-09-01")

# list empty to store the holds operations
data.list <- list(NULL)

data.list[[1]] <- lucC_pred_holds(raster_obj = rb_class, raster_class = "Pasture",
                                  time_interval = c("2001-09-01","2016-09-01"),
                                  label = my_label, timeline = my_timeline)
data.list[[2]] <- lucC_pred_holds(raster_obj = rb_class, raster_class = "Degradation",
                                  time_interval = c("2001-09-01","2016-09-01"),
                                  label = my_label, timeline = my_timeline)
data.list

# extract frequency from list data
d <- lucC_extract_frequency(data_mtx.list = data.list, cores_in_parallel = 2)

# use the frequency extracted from list
lucC_result_measures(data_frequency = d, pixel_resolution = 232)



## End(Not run)

ammaciel/lucCalculus documentation built on June 13, 2020, 4:57 a.m.