isocat (version 0.3.0)

makeOddsSurfaces: Convert probability surface to odds-ratio surface

Description

Converts normalized probability surface (e.g. one layer output of isotopeAssignmentModel function) to Odds Ratio surfaces.

Usage

makeOddsSurfaces(probabilitySurface, rename = FALSE)

Value

Returns RasterLayer rescaled to Odds Ratio values.

Arguments

probabilitySurface

Normalized probability surface RasterLayer

rename

Character value to append to raster name (e.g. "_odds"). Defaults to FALSE.

See Also

oddsAtSamplingLocation

Examples

# Generate example probability surfaces.
myiso <- rasterFromXYZ(isoscape)
myiso_sd <- rasterFromXYZ(isoscape_sd)
df <- data.frame(
         ID = c(-100, -80, -50),
         isotopeValue = c(-100, -80, -50),
         SD_indv = rep(5, 3)
         )
assignmentModels <- isotopeAssignmentModel(
         ID = df$ID,
         isotopeValue = df$isotopeValue,
         SD_indv = df$SD_indv,
         precip_raster = myiso,
         precip_SD_raster = myiso_sd,
         nClusters = FALSE
         )

# Convert to odds ratio surfaces.
odds_ratio_surface <- stack(
   lapply( unstack(assignmentModels), makeOddsSurfaces )
   )
plot(odds_ratio_surface)