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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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Why does MaxentTagger tag numbers as NN sometimes?

I am trying to tag a HTML page full of space-separated numbers like "5320412185 5320412184 5320412189..." to observe how the tagger behaves with numbers. I'm using english-left3words-distsim.tagger in the constructor. I'm observing on the console…
A.R.K.S
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Using Stanford classifier for character recognition

I am working on an OCR related android app and I need to use multivariate logistic regressions for the classification of alphabets. My question is that that can I use Stanford classifier(http://nlp.stanford.edu/software/classifier.shtml) for…
Abdul Wasae
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predict function for MaxEnt(Software R)

I'm trying to use predict function for predict potencial occurrence points in space transfer. For this I using dismo package loaded with presence points in original space, 17 raster layers for original space and 17 raster layer for transfer space.…
Ricardo Adelino
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How to read .tagger file that comes with stanford pos tagger

I cant read the .tagger file which comes with the stanford maxent tagger for my language with a text editor. How could I view the contents of the .tagger file.
user567879
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MaxEnt classifier implementation in java for linguistic features?

I want to train a MaxEnt classifier over a training corpus. My features are syntactical and semantical like POS tags or NER tags and so on. Is there any MaxEnt classifier implementation in Java that support defining such features?
user3070752
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why do we need regularization for training MaxEnt?

I'm reading jurafsky's book for NLP and it mentioned for training MaxEnt we need to regularize weights to prevent overfitting. But I can't understand why this occurs. Can anyone explain how overfitting occurs during training maxent if we don't use…
user3070752
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stanford maxent classification prediction

I am trying to use stanford maxent classification to classify data using 4 features and the 5th one is class. When I am supplying test data then the accuracy is 99% which seems next to impossible. When I check the labels predicted, they were…
Ritika Jain
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Step by Step Training own chunker model of different language using OpenNlp and getting probability score for predicted sequence

I did go through the documentation available linked below. But things are still not clear as in how I should proceed? I followed the correct input training format but gets error as follows. cmd command: ./opennlp ChunkerTrainerME -model…
Linguist
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Maxent - Variable names in map of limiting factors

Hope someone here can help me with this, or know where I can ask. I have made a distribution model using maxent (versio 3.3.3) in R (dismo package), and thereafter made a map of limiting factors as described in the appendix of Elith et. al.…
Kristin W
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Calculating area of occupancy from a binary unprojected raster

I have a series of binary raster layers (ascii file) showing presence/absence of a species in Europe and Africa. The file is based on unprojected lat/long (WGS84) data. My aim is to calculate the area of presence using R (I don't have access to…
Heather
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Is a Conditional Random Field with training sequences of length 1 just a Maxent model?

I am trying to perform a classification procedure where my training data looks like this: (state, (feature_1, feature_2, feature_3, ..., feature_n)) Thus, given a set of features, I need to predict what state/label/class those features most likely…
user3898238
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MAXENT model in R for Classification

I am trying to Classify text using RTextTools package using R. I have done this using - SVM (and the below code works fine :) matrix[[i]] <- create_matrix(trainingdata[[i]][,1], language="english",removeNumbers=FALSE,…
Prasanna Nandakumar
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issue with uploading and stacking environmental raster layers into R

I am trying to upload a bunch of environmental raster layers into R for a SDM. They are all the same extent, pixel size, etc., and most of my layers are uploading fine, but my BIOCLIM layers are not. I was able to plot each layer and it looked…
Raspberria
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