Questions tagged [orange]

Use for questions about Orange, the free, open-source, component-based, data mining and machine learning software suite.

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1answer
580 views

Scripting code for class imbalance in Biolabs Orange

I'm trying to manipulate some data in Biolabs Orange, using the built in Python Script widget and information at Biolabs Orange tutorial on scripting. However, I'm struggling with taking the results ...
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1answer
60 views

Could I use logloss as classifier performance measures when “Test & Score”?

I try orange today, and want to use logloss as the classifier performance measures when "Test & Score", but I don't know how to do that.
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1answer
56 views

Filtering detail table based on selection in summary table in Orange 3.11

I'm rather new to Orange, so apologies in advance if I'm missing something obvious or am trying to fit a square peg in a round hole. I have two files, Summary and Detail, that I'm importing into an ...
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0answers
22 views

Orange: Creating Returns series

I am trying to create a 'returns' series for an asset i.e. EURUSD If my series is named $S$, I need to define $R(t)=S(t)/S(t-1)$. Is there a clever way to create the lagged variable in the Feature ...
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0answers
60 views

Scripting inverse PCA or MNF in Orange (biolab)

I have a data table with many rows and columns that I have successfully taken through K-means and PCA workflows in Orange. Now I'm trying to calculate the "minimum noise fraction" of the data. This is ...
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0answers
91 views

Orange Biolab custom widget learner input

I was able to install the demo widget in Orange 3.9.1 and made it work with these learners Naive bayes Logistic regression In other words I was able to connect the nodes to the newly installed "...
2
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1answer
2k views

Export Python Code from Orange

Since Orange is just running python code under the hood... is it possible to set up and do my analysis in Orange but then export or output the underlying code for documentation or replication?
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1answer
3k views

Orange: Data has no target variable error

I am trying to apply Random Forest algorithm on a data set using Orange. The target variable is not set in the data set. However, I know which column is the target variable. How can I specify the ...
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0answers
117 views

Orange machine learning Text mining twitter feature

I am using the twitter feature in Orange. However, when I save the corpus in a file, it eliminates the detailed URL information (unwrapped / expanded URL ). It only provides the shorten version of the ...
1
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1answer
162 views

Orange: Save Model

I set up a neural network model with a training and test data set and saved the model with the "Save Model" - Widget. I wonder what kind of information the saved pickle-file contains? Does it only ...
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1answer
43 views

Classification execution time - Orange

Is there any way to find out execution time for classification algorithms in orange?
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1answer
107 views

In orange, how do you split a given table at a certain row id?

I was thinking of adding another column called "Test / Train" in which a 0 would indicate test and a 1 would indicate train data, and then as I'm collecting data end the train data collection phase ...
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1answer
231 views

How to use SVM in Orange

How to use SVM in Orange for sentiments analysis? We will generate sentiments using sentiments analysis widget but now how to use SVM and how to teach SVM in Orange? i am use xlsx file format then it ...
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1answer
84 views

Has anyone gotten the Orange3 Prototype Widget “Significant Groups” to work?

The Prototype Widget "Significant Groups" would be a great help in hypothesis testing. Has anyone gotten it running??? I have tried just about everything. Whenever I try to "Compute", I get the ...
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1answer
121 views

Getting results of folds in orange canvas

I am using Orange Data mining 3.8 to classify a dataset using leave one out cross validation. I know that the results ($AUC$, $CA$, $F1$) are averaged; How can I get the results ($AUC$, $CA$, $F1$) ...
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0answers
148 views

How to tune the hyper-parameters of an estimator in Orange Tool

Hi I want to tune/search hyper-parameters of SVM in Orange tool. How can I do? I want to apply Exhaustive Grid Search to SVM http://scikit-learn.org/stable/modules/grid_search.html
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0answers
255 views

P-values in Orange

I'm new to orange and struggling to find p-values, using different regression tools. It seems the outputs are only coefficients. What am I missing?
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0answers
438 views

Use Feature Constructor in Orange to extract number from string?

I would like to use the Feature Constructor to extract numbers from a column of strings. ...
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1answer
211 views

Using already trained classifiers in Orange

I know that with Orange it is possible, using the 'Test & Score" widget, to test the performance of a classifier trained on a specific training set using a different test set ('Test on test data' ...
2
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2answers
3k views

Training set, validation set, and test set with Orange

Is it possible with Orange (only using its widgets, without writing Python code) to implement the following typical machine learning processes? Train a training set, Validating a validation set (e.g....
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1answer
295 views

What does the Orange widget “Image Embedding” do exactly?

I would need to know what this widget does. What architecture does it use? What dataset has it been trained on? And so on.
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2answers
756 views

Orange3 summarizing data, grouping data values

Is there a simple way in orange3 (not writing a Python script) to summarize data and group similar data values? For example, instead of plotting a scatter with lots of data points, I would like to ...
2
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1answer
361 views

Is there an Orange server to deploy the models developed in Orange 3

I am new to Orange 3 and while the tool looks very promising, I was wondering if there is an Orange server where the model can be deployed for a production instance.
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2answers
639 views

Orange 3 “Find Informative Projections” and target variables?

Having issues with the "find informative projections" feature in Orange 3. In order to be able to use this feature in the scatterplots, you have to select a target variable in the "select columns". So ...
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0answers
165 views

Problem connecting to Postgres [closed]

I want to use the SQL table connector to link data in a PostGres database which is on my local machine running as 9.6. When I do this I get the following error; ...
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2answers
177 views

Orange Changes the data type

I have a column as month in my excel data set, when i load the data in the file, orange changes it to some numerical values.. Help! I want the Month as it is. Tried changing the value type as short or ...
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2answers
2k views

Why Orange “Predictions” and “Test & Score” produce different results on the same data?

It is not very clear what is the difference between the following two schemes: From help docs: Test & Score widget: tests learning algorithms on data. Predictions widget: shows models’ ...
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0answers
52 views

Orange canvas will not properly parse/open a file with a long header (column) line

I have a tab delimited data set with 23 columns. The header for this file names the 23 different features in the dataset. The column names are... file yval size err a-value b-value c-value ...
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1answer
99 views

exporting the model parameters after training and testing

I want to construct a python micro service to generate predictions based on inputs from web via an API. I have trained a logistic regression model, but need to create a python script to run in AWS ...
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1answer
333 views

How do I get a word frequency list? Can't export from Word Cloud

I have a list of survey responses and want to analyze the frequency of words used. Using Orange, I've loaded the file into a Corpus, then Preprocess Text, then Word Cloud. The Word Cloud does not ...
4
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3answers
8k views

Overcoming “too many indices for array” error when loading file into Orange

I am attempting to load the Stack Overflow 2017 developer survey results into Orange. The dataset has ~51.4K rows with 156 features. It is comma separated and is about 91MB in size. When I attempt to ...
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2answers
2k views

How do I access orange on Ubuntu 16.04

I have used pip to install orange and the installation seemed fine. There was not Orange icon on my ubuntu 16.04 desktop and tried orange3 in the command line, it didn't work, and tried python3 -m ...
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2answers
1k views

Using Predictions: Data does not have the same target as predictors

As per the Orange video tutorial: youtu.be/D6zd7m2aYqU?list=PLmNPvQr9Tf-ZSDLwOzxpvY-HrE0yv-8Fy I'm trying to make predictions on a new dataset based upon one that's already been 'coded' - both data ...
1
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1answer
500 views

Using Orange3 to predict image class

I used logistic regression to classify 3 classes of images: cars, dogs, cows. The accuracy is 100%, perfectly separated in clusters (scatter plots). When I try to use the learner to predict 3 images (...
6
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2answers
456 views

Differences between Test & Score results and calculated by Confusion Matrix (accuracy, sensitivity and specificity)

We are using Orange and have 2 files (training and testing). We apply different Learners (kNN, AdaBoost...) and get the Evaluation Results. But we have some doubts about some options in the Test & ...
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1answer
187 views

Can I create a word cloud of crowdfunding donors using word cloud?

I have a table like this: FirstName SecondName Amount Lorenzo Perone 100 Mario Rossi 25 ... ... ... I'd ...
1
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1answer
5k views

Orange (Data Mining) : How to start using “Orange” from Python Anaconda Environment? [closed]

I have install "Orange Data Mining v3.4.1" in Anaconda Python v3 environment using commands : "conda install orange3" sucessfully. However, I do not know how to call "Orange" as Application to start ...
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2answers
178 views

Picking the right file format for Image Embedding

I have been using Orange Machine Learning software to try to create a facial recognition program. I am trying to import images (test data) using the import images widget. Do you guys know which file ...
0
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1answer
136 views

Does anyone actually have Orange running on a Mac to test?

I have been trying now for over a week to download some GitHub add-ons for Orange. I do not know how to use Terminal and I am asking for help to install these packages. The link is git@github.com:...
1
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2answers
189 views

Orange Infrared

I must say Orange has really done great job in the world of machine learning. I have 3 questions. (1) I have found "Orange Infrared" has been added recently. But I haven't found any kind of data ...
2
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1answer
256 views

Installing Package from GitHub for ML in Orange [duplicate]

Trying to integrate some prototype widgets into Orange Data Mining to do some machine learning with facial recognition. Trying to install the package from https://github.com/biolab/orange3-prototypes....
2
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2answers
196 views

How do I integrate github files to Orange for ML?

I am currently trying to make a facial recognition workflow with Orange but since the widgets are still prototypes they are not all available in Orange. I found the github files for the widgets but ...
1
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1answer
105 views

Orange Iris.tab error [closed]

This is the error message that is popping up when I start up Orange Data Mining and try to load the iris.tab data file. It used to work fine now it is showing this error. How do I fix this? I am very ...
0
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1answer
212 views

Orange3 does not show Geo Map tool on OS X

I am using Orange 3.3.11 and I cannot find "Geo Map" widget on OS X. But the documentation says there is such a widget. How can I find this widget?
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1answer
1k views

Orange Text Mining Data Format

Is there a special header structure required for text classification problems? I'm trying to do Tweet classification using the text mining plugin. I have the data in a CSV file, with one column ...
0
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2answers
67 views

Is there a way to weight instances based upon the values of a feature?

Is there a way to weight instances based upon the values of a feature? For instance for making a sample better resemble a population on certain parameters.
1
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1answer
291 views

Predict datetime variable with orange canvas

Since Orange is able to read datetime variables, i tried to build a simple workflow to predict datetime variables via regression. Loading the data etc. is no problem, but when it comes to predict the ...
2
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1answer
1k views

How to get summary statistics in Orange?

I just started using Orange, and am having trouble finding how to get basic summary statistics, like the n (count), average, and standard deviation. Is there a widget that does this and I'm simply ...
1
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1answer
660 views

Orange 3 - Same prediction for all of my data when using impute widget

When I use a linear or random forest regression to train from data, I can make predictions with test data. I have a problem when I introduce the "impute" data widget in my pipeline to fill in the ...
0
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1answer
2k views

Orange 3 - Feature selection / importance

I am using (and loving) Orange 3 for some projects at my school and have a question: When using Python and e.g. doing a RandomForest Classification, I can easily access the feature importances by ...