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9 votes

What is Orange all about?

As you mentioned, Orange is a data mining software developed by the University of Ljubljana. It can be used for developing and testing machine learning models as well as conducting exploratory data ...
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5 votes
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Error opening Iris.tab file in Orange load data widget

This was an error in Orange 3.3.11, and fixed in release 3.3.12. Update to the newest release to get rid of the error.
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5 votes
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Orange (Data Mining) : How to start using "Orange" from Python Anaconda Environment?

Instructions can be found on their Github page: https://github.com/biolab/orange3#starting-orange-gui
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  • 301
4 votes

Regression for non linear data

You have to add higher order polynomial terms to your dataset yourself. Accordingly, you should add new columns to your dataset which consists of higher order polynomials with the desired combination ...
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3 votes
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Installing Orange Package with older Python Version?

The error message shows exactly what you need to do: Orange requires Python>=3.4 You have to specify a Python>=3.4 version (with orange3 itself installed) while installing ...
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  • 4,016
3 votes
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How do I integrate Github files to Orange for ML?

There are three ways to install Orange add-ons: The Options -> Add-ons menu of Orange. Use pip: ...
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  • 4,016
3 votes

Orange Infrared

An infrared data set "Collagen spectroscopy" is available in the "Data Sets" widget. There are some other but small data sets in the infrared data folder: the easiest way to find the folder is to ...
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3 votes

Orange Text Mining Data Format

No, no special structure is required for text classification problems in comparison with core Orange. However — and this holds for core Orange as well as for text addon — if you would like to perform ...
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  • 186
3 votes
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How to get summary statistics in Orange?

I found 3 ways to do it : you have to use the Data Info widget who gives the number of rows of your dataset and the Box Plot widget who prints the average and the standard deviation of each feature ...
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  • 211
3 votes

In Orange, is it possible to analyze or visualize real time, streaming data?

"Realtime" is a very big word, in many regards you would only call a system realtime when there is very little latency in a system, almost no latency. It would require specialized hardware and os, for ...
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  • 304
3 votes

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

This is because we have to exclude the target column from the second document (testing data-set). In your example remove the column 'Status' from second file. Example: In below example, in ...
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3 votes

Using already trained classifiers in Orange

A scheme like this should work. Namely, you pass training data directly into the the learner widget and pass its trained Model into Predictions widget along with labeled test data.
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  • 3,322
3 votes
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Orange: Data has no target variable error

You can specify the target by choosing target in the feature column
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3 votes
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Classifying Data in Orange: What's the difference between 'Features', 'Target Variables', and 'Meta Attributes'

Meta variables are meta data, data about data, not used for statistical inference. Features or variables or attributes are the measured inputs of the problem domain, the independent variables. The ...
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  • 3,322
3 votes
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Does Orange scale the data automatically for the linear regression with Ridge regularization

Not by default, no, as shown by the normalise=False here: class Orange.regression.linear.RidgeRegressionLearner(alpha=1.0, fit_intercept=True, normalize=False, ...
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2 votes

Orange 3 - Feature selection / importance

You can connect Random Forest widget into Rank widget, which I guess is meant for subset feature selection. See Orange screenshot #19.
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  • 3,322
2 votes
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Is there a network analysis tool built into Orange?

This Networks add-on for Orange data mining suite should help you. If you are open to using other solutions, I would recommend networkx Python library.
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2 votes

Target variable problem :- Classifier

According to the message I assume that the class variable is not set correctly. Can you try with this excel file? I just removed percentage signs and renamed variables otherwise this is your data. ...
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  • 186
2 votes

How to preprocess data in a data table? (e.g. change a value in each row for some feature)

To scale the data, you can use Preprocess widget. To construct new features, e.g. new_feature = old_feature - some_values you can use Feature Constructor widget.
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2 votes
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Differences between Test & Score results and calculated by Confusion Matrix (accuracy, sensitivity and specificity)

Test on train data uses the whole data set for training and then for testing. This method practically always gives wrong results. So, yes, in this case, the model is learned and tested on the same ...
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2 votes
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Can I create a word cloud of crowdfunding donors using word cloud?

I will give you a simple solution using R which requires the wordcloud package. Of course there are many other solutions which do not require any programming skills. The solution is a slight varient ...
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  • 281
2 votes
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Installing Prototype Widgets in Orange running on Mac

The easiest way to install Orange's addons is through the application itself. Open Orange, in the menu click Options -> Addons. In the popup window mark ...
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  • 186
2 votes

Predict datetime variable with orange canvas

It appears those numbers are Unix timestamps. The numbers you quote correspond to the following human-readable dates in ISO format: ...
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  • 3,322
2 votes

What is the correct file extension for Orange image embedding?

As r.kfr said: Import Images works with folders, not individual images. Place all images in a folder and select it for import. Note that if you have images in different folders, Orange will consider ...
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  • 301
2 votes

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

Test on train data gives you good results but when tested against the reality, majority of time it fails as test on train data does the testing on train data itself and results overfitting. You ...
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2 votes

How do I access orange on Ubuntu 16.04

From the Orange3 Pypi documentation : To start Orange GUI from the command line, assuming it was successfully installed, run: ...
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  • 21
2 votes
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Why Orange "Predictions" and "Test & Score" produce different results on the same data?

Perhaps I can elaborate a bit on this. Test&Score is used for evaluating a model. You provide T&S with training data and the learner (e.g. Random Forest) and then the widget performs 10-fold ...
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  • 301
2 votes

Training set, validation set, and test set with Orange

The answer is yes. If Test & Score is given only one data set, then all it can do is show results of cross-validation. To test the models on a separate data set, use separate File widgets to load ...
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  • 151
2 votes

Classification execution time - Orange

you can just use time library and give time counter like time save to variable and after classification take time now save to variable and subtract both and print the result you get the execution time
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2 votes

Export Python Code from Orange

Since I was also looking for it just yesterday being a newbie,sharing what I found , As per Orange FAQ it says and it directs to the link @K3---rnc mentioned. But i found similar request as well not ...
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