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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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Creating training data for a Maxent classfier in Java

I am trying to create the java implementation for maxent classifier. I need to classify the sentences into n different classes. I had a look at ColumnDataClassifier in stanford maxent classifier. But I am not able to understand how to create…
Ankit Bansal
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How can I separate many files from one folder into separate folders based on the name of the files?

The current file organization looks like this: Species_name1.asc Species_name1.csv Species_name1_Averages.csv ... ... Species_name2.asc Species_name2.csv Species_name2_Averages.csv I need to figure out a script that can create the new…
Mr. ReLu
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Raster file with NAs as areas out of a environmental convex hull

I am asking for your R skills' support. For one of my papers, I am modelling the distribution of tree species in Amazonia using remote sensing variables (LT band 3, 4, 5, 7, DEM and NDVI) and I am planning to mask out all the sites out of the…
Pablo Perez
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Running Maxent in R

Sorry if this question has come up before but I would like to ask if anyone knows what goes into each of the arguments in maxent() from the dismo package? I have searched the various R forum sites and the R help page itself but I couldn't understand…
Abel
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R - How to get one "summary" prediction map instead for 5 when using 5-fold cross-validation in maxent model?

I hope I have come to the right forum. I'm an ecologist making species distribution models using the maxent (version 3.3.3, http://www.cs.princeton.edu/~schapire/maxent/) function in R, through the dismo package. I have used the argument "replicates…
Kristin W
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Training models using openNLP maxent

I have gold data where I annotated all room numbers from several documents. I want to use openNLP to train a model that uses this data and classify room numbers. I am stuck on where to start. I read openNLP maxent documentation, looked at examples…
user2788945
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Maxent in R Error: Bias grid cannot be used with SWD-format background

I get this error when running; me_1 <- maxent(pred, occ, args='biasfile=bias') Error: Bias grid cannot be used with SWD-format background where 'pred' is a raster stack, 'occ' is a csv file of lat/lon, and 'bias' is a raster. The model runs fine…
user2175481
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What features Apache OpenNLP does use by default while running its named entity recognition (NER) models?

I know Apache OpenNLP uses MaxEnt model for its NER tagger. But what features Apache OpenNLP does use (by default) while running its named entity recognition (NER) models? and also how can we incorporate/customize new features in OpenNLP (Java…
user4213837
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Maxent: Error in match.names(clabs, names(xi)) : names do not match previous names

I'm attempting to predict elk elevational selection using elk location points (Elk) relative to an NED elevational raster (Elev) using maxent in R. Both are projected in NAD83 using lat/long, and I've cropped the raster to get around memory issues…
S. Smythe
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Using a test sample file with MaxEnt in R

I worked a lot with MaxEnt in R recently (dismo-package), but only using a crossvalidation to validate my model of bird-habitats (only a single species). Now I want to use a self-created test sample file. I had to pick this points for validation by…
S. Gey
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Imbalanced data and sample size for large multi-class NLP classification

I'm working on an NLP project where I hope to use MaxEnt to categorize text into one of 20 different classes. I'm creating the training, validation and test sets by hand from administrative data that is hand written. I would like to determine the…
Andrew Brown
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Java error while running maxent in biomod2

I am running maxent from R, in the package biomod2 and the following error appeared. I do not come from a technical background and wasn't sure why is this error happening. Is it a memory problem or someone said the java path is not set. But I…
user53020
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edit config file in stanford pos tagger

i have tagged a simple sentence and this is my code: package tagger; import edu.stanford.nlp.tagger.maxent.MaxentTagger; public class myTag { public static void main(String[] args) { MaxentTagger tagger = new…
Chelsea-fc
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My Maxent Classifier works fine with gis algorithm but does not work with iis algorithm. It is not throwing any error, just some warnings

I am trying to implement the Maxent Classifier but I am facing problem while using the iis algorithm.The following code works fine for gis algorithm. import nltk from nltk.classify import MaxentClassifier, accuracy from featx import…
Abhishek Sharma
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How to speed up the model creation process of OpenNLP

I am using OpenNLP Token Name finder for parsing the Unstructured data, I have created a corpus(training set) of 4MM records but as I am creating a model out of this corpus using OpenNLP API's in Eclipse, process is taking around 3 hrs which is very…
Nikhil Jain
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