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Questions tagged [maxent]

Software library based on the maximum-entropy approach for species habitat modeling

The software takes as input a set of layers or environmental variables (such as elevation, precipitation, etc.), as well as a set of georeferenced occurrence locations, and produces a model of the range of the given species.

See the project homepage for more.

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Apache open nlp maxent: proper method to handle 'probability distribution' labels?

Apache open nlp maxent: is it possible to set 'probability distribution' label? I have read football.dat, gameLocation.dat, and realTeam.data and tried CreateModel.java and Predict.java in the 'sports' package. The prediction results are classes…
Tom
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Saving and Loading Trained Stanford classifier in java

I have a dataset of 1 million labelled sentences and using it for finding sentiment through Maximum Entropy. I am using Stanford Classifier for the same:- public class MaximumEntropy { static ColumnDataClassifier cdc; public static float…
Xavier
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Feature Selection using Maxent classifier

I am using maxent classifier on a dataset with 138,314 rows and 43 attributes. The form of training data are like below: Feature Class Cloudy Sad... Humid Outdoor If I test the model on held-out data, the accuracy is just…
Mility
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How to run maxent.jar with -z from command line in Linux

I can launch the gui from command line in Linux using: java -mx1500m -jar maxent.jar The html output file has the full command line ie. java density.MaxEnt nowarnings noprefixes -E "" -E species1 responsecurves jackknife…
SteveResearch
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Modifying and Masking Environmental Layers within specific asia area in R

I am trying to prepare the environmental layers (constrained in specific Asia area) for use in Maxent model. However, I ran into some error messages in the last line: library(sp) library(maptools) library(rworldmap) library(dismo) # A specified…
Lihsin Wu
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Which MaxEnt accuracy to report?

In NLTK, the MaxEnt classifier reports multiple accuracy metrics, as shown in the screenshot below. The first set is the accuracy per iteration. The second, printed at the bottom of the screenshot, is reported by calling…
Hamman Samuel
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OpenNLP MaxEnt - ContextGenerator and EventStream

I want to write my own model using openNLP MaxEnt, for that I want to implement ContextGenerator and EventStream interfaces(as mentioned in documentation). I looked at the these implementations for openNLP Chuncker, POSTagger and NameFinder, but all…
user2788945
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Why MaxEntropy in weka always results in JVM out of heap?

i am trying Maximum Entropy in weka for text classification. I am using Logistic Regression in Weka which is equivalent to Max Entropy. I read that its is computantially expensive. I have current setting of 2G alloted to JVM and i keep word vector…
Kashif Khan
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Support with R error code: Error in if (getOption("scipen") <= min(digits)) { : missing value where TRUE/FALSE needed

Hi I am trying to run ENMeval on occurrence data and some rasters to determine settings for MaxEnt modelling. Whenever I try to run some of my code containing the raster layers, ie: #resample layer Elevation_resample <- resample(Elevation, FC,…
alex_allenby
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Maxent: number of presence records for training and testing

I run Maxent using 20 presence data and set the 'Random test percentage' as 25 %. The HTML output shows me '7 presence records used for training, 2 for testing'. I don't understand why the total amount of input and output data are different. Can…
Jungmin Lee
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dismo MaxEnt does not run with categorical variables

I am trying to build a MaxEnt model in dismo, using a data frame. I already have presence-absence data and extracting the covariates for each point, so the only data I need is this one data frame. I have no issues running the model with continuous…
Sara
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How can I increase the number of background points when running MaxEnt in R

I am using the DISMO R package to run MaxEnt. I put in ngb=10000, but it seems to be ignored. My code is: meX1_2 <-maxent( Present_stack, X1_2, nbg=10000, factors="litology_ASC_Present", args=c("maximumbackground=40000",…
M.G.
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Why do I get different models when using MaxEnt user interface and R?

I have run MaxEnt using the regular software user interface and I have got a nice model which predicts very accurately the distribution of a species. Then I ran MaxEnt in R using the same variables, same spatial extent and same occurrences and got a…
M.G.
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How do I import the MaxEnt (Java) outputs from my models into R for AIC calculation?

I ran a few models in the Java MaxEnt program showing the species distribution model of an invasive species, and I want to import the outputs that it gave me (I have a folder of them, some asc files, some html, some plot pngs…) into R in order to…
Deana Hutcheson
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How to fix an error of "invalid connection" in R

I have been using R code to predict the future distribution of small mammal species based on records of their occurrence in the Atlantic Forest and predictions of environmental variables. I used this code just fine throughout last year: maxent <-…
Isabella Bento
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