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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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 through the add-on menu. I found the Github ...
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0 votes
1 answer
180 views

Error opening Iris.tab file in Orange load data widget [closed]

I am attempting to load in the Iris.tab data set into the Orange load data widget. However, when I do this, I get the following error message (shown above). This keeps popping up when I start up ...
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0 votes
1 answer
370 views

Orange 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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1 vote
1 answer
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 votes
2 answers
82 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.
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1 vote
1 answer
463 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 ...
3 votes
3 answers
3k 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 ...
  • 133
1 vote
1 answer
1k 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 ...
  • 11
0 votes
1 answer
4k 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 ...
0 votes
1 answer
204 views

Is there a network analysis tool built into Orange?

I am interested in a canned or built-in network analysis tool. Wondering if this is possible with Orange.
  • 15
0 votes
1 answer
48 views

Score for Ranked plots using scatter plot widget

I'm using orange 3 and when I Score plots using the scatter plot widget how do I view the numerical score associated with the ordered list of plots. Did that feature get removed with the upgrade from ...
1 vote
1 answer
9k views

Target variable problem :- Classifier [closed]

I installed orange version 3 yesterday. I defined variables in excel file as per instruction given in documentation. When I used simple plots it works fine but in case of classifier it's not working. ...
-1 votes
1 answer
133 views

How to connect dots with lines in Scatter Plot or some other Plot?

Subj. Given the following in Scatter Plot: . . . . How to get something like: . / \ .__. . ?
  • 99
0 votes
2 answers
1k views

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

I Have a general question - how to preprocess data in Orange. E.g. I want to do something with each row value of some feature. How can I do this visually? And how can I do this via Python Script? So ...
  • 99
1 vote
1 answer
394 views

How to create a social network like IBM's Watson News Explorer?

I was much impressed by the news-explorer view of IBM.It shows a network view with on searching a keyword and it explores the relational edges with a graph. Here it is I think it uses the k-means ...
1 vote
1 answer
908 views

Database missing extensions:tym_system_time,quantile orange widget error

I'm working with the orange data mining tool. In most of the examples data taken from files or google sheets links but in the blog link they given that we can take data from postgresql database ...
0 votes
1 answer
105 views

Import Orange 2.7 canvas in Orange 3 [closed]

I have a saved canvas I created in Orange 2.7. I just installed Orange 3 and opening the old canvas gives multiple "UnknownWidgetDefinition" errors. I gather that the naming/location of some widgets ...
0 votes
1 answer
2k views

Do statistical test with orange between data

I'm learning orange and I'm looking to performe some statistical test on my data. The test I usually do are z-test, t-test, chi-square test and Anova. Can I use a widget to do these or should I do a ...
0 votes
1 answer
1k views

Orange, K-means clustering, memory error

I have a dataset of over 67 000 records, and I'm trying to run a k-means cluster analysis on that. Orange returns a memory error. The data is in an excel file, but I also tried to load it from a csv. ...
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2 votes
1 answer
987 views

Overcome memory limitation when downloading from database into Orange

I would like to run the association rule mining algorithm of the Orange library on a dataset that is stored in a PostgreSQL database. The table 'buildingset' contains the itemsets for each user, thus ...
4 votes
1 answer
597 views

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

Using orange, I would like to be able to do real time analysis or visualizations on streaming data. I would appreciate any input on the matter!
1 vote
1 answer
53 views

Discrete Values Matrix: Select Rows and Scattered Plot problem

I ran in a somewhat basic problem with Orange 3.3.1... but wonder if this is a bug or something I don't understand: I have a Matrix, all with discrete values. I select Columns, that goes ok Select ...
1 vote
2 answers
354 views

Text Mining error

I'm trying to get used to text mining using orange. I set up a very easy workflow loading a corpus (tab separated text file containing 10 entries), using a corpus viewer that shows my data correctly ...
4 votes
1 answer
154 views

Is it possible to create feature groups in Orange?

Background: I am trying to use Orange as to classify if a patient has TB based on their coughing sounds. In the dataset, there are say 100 patients and for each patient we have 10 coughs. For each ...
3 votes
1 answer
565 views

Can I run Orange widgets from normal Python scripts?

I'd like to do normal machine learning with Python and Sklearn, but occasionally use the nice graphical widgets or Orange for presentation. Is this possible?
  • 355
3 votes
1 answer
678 views

How Orange makes decision about declaration of a meta attribute

I wonder how Orange decides which attribute is declared as a string? I have few discrete attributes in Excel, which I can't use as Orange does not recognize them as discrete. Have tried export excel ...
  • 31
2 votes
1 answer
528 views

Orange 3 Heatmap clustering under the hood

I have recently used the heatmap widget in Orange 3. All the documentation says is "Clustering (clusters data by similarity)". Is this using hierarchical or k-means or some other type of clustering? ...
  • 123
4 votes
2 answers
3k views

Question about (Python/Orange) Apriori associative algorithm

I'm trying to wrap my head around Association rules and frequent itemsets. So I threw my data in, instead of the samples one and sometime it works, sometimes it doesn't. ...
  • 183
1 vote
0 answers
94 views

SPSS style custom tables in Orange

Is there a way to draw custom tables like in SPSS where you put some attributes to rows and some to column to visualize clustering results?

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