ERROR - blockCV folds in biomod2

[jopaulo77]

Hi dear, I'm with a problem when a make a BIOMOD_Modeling using spatialBlock function in my modeling. Bellow, I put part of my script and the error message. Please, could you help me with this problem? Thanks,

... library(blockCV) library(sf)

import presence-background species data

pb_data <- st_as_sf(sdmdata, coords = c("x", "y"), crs = crs(myvar))

number of presence and background records

table(pb_data$Species)

spatial blocking by specified range with random assignment

sb <- spatialBlock(speciesData = pb_data, species = "occ", rasterLayer = myvar, theRange = 300000, # size of the blocks k = 5, selection = "random", iteration = 100, # find evenly dispersed folds biomod2Format = TRUE, xOffset = 0, # shift the blocks horizontally yOffset = 0)

sac <- spatialAutoRange(rasterLayer = myfuturevar.2070.85, sampleNumber = 5000, doParallel = FALSE, showPlots = TRUE)

DataSplitTable <- sb$biomodTable ############

MODELING

############

myRespName <- 'Bartramia.longicauda' myBiomodData <- BIOMOD_FormatingData(resp.var = sdmdata[,1], expl.var = myvar, resp.xy = sdmdata[,2:3], resp.name = myRespName, na.rm = TRUE)

myBiomodData

Defining Models Options using default options.

myBiomodModelOut <- BIOMOD_Modeling(myBiomodData, models = c("GAM"), models.options = myBiomodOption, NbRunEval = 10, DataSplit = DataSplitTable, VarImport = 0, models.eval.meth = c('TSS', 'ROC'), do.full.models = F, modeling.id ="test")

Checking Models arguments... Error in .Models.check.args(data, models, models.options, NbRunEval, DataSplit, : objeto 'myBiomodOption' não encontrado

[rvalavi]

Hi @jopaulo77

Did you try to run the biomod funtion without the DataSplitTable option?

[jopaulo77]

Hi dear, Thank you for your contact. Sorry, but if I try to do this I don't get imagine how I'd validate my model. Just explain, I have 28 migratory species and I have to fit a model in present and forecast in future. Could you help me with this procedure? Cheers,

[rvalavi]

You're welcome! I understand you need to evaluate your models. I just want to check where the error comes from. Because the error could be from other parts of biomod such as model options etc..

Have you tried to print sb$biomodTable to see if it is creating the matrix?

[jopaulo77]

Hi dear, Yes. When a print de results, I get to access the result matrix. To generate the results in BlockCV I used presence and pseudoAbscense data, and environmental data and landcover data.

[rvalavi]

This error is probably from biomod, not blockCV. If you like, you can email me your data (or a subset of it) and I will have a look.

[jopaulo77]

Hi Dear, I have sent a sample data by rvalavi@student.unimelb.edu.au.

Thank you for your help, and maybe we can make a collaboration in this study.