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

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Creating API For Accessing New Website

Is there a way to add a API in Orange Data Mining Tool to access a new website? An example would be can I create and add an API for CNN or MSNBC or FOXNEWS? Currently in Orange in the text mining add-...
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15 views

How to check PCA in Orange?

Input file: T X Y A 1 3 A 5 8 B 7 6 B 4 2 T is categorial target variable I calculate PCA in Orange: components X Y 1 PC1 -0.707107 -0.707107 2 PC2 0.707107 -0.707107 T PC1 PC2 1 A 1.58032 -...
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24 views

Data table manipulations in Orange

I am having some issues doing operations on my data table in Orange. I need to split my table into two different tables, being a table containing all the instances for y = yes and a table containing ...
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23 views

Stratified K Fold Cross Validation in Orange: python script

I am using Orange to predict customer churn and compare different learners based on accuracy, F1, etc. As my problem is unbalanced (10% churn - 90% not churn), I want to oversample. However, when ...
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1answer
34 views

Cross validation for unbalanced dataset using Orange data mining tool

I am using the Orange data mining tool to build and analyze models (decision tree, ANN, ...) predicting customer churn. As this is an imbalanced class problem (10% churn, 90% not churn), I need to ...
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25 views

Orange data mining: Balancing data set using imblearn code

I am using an unbalanced dataset. I wanted to oversample my dataset using a python script (Scripting code for class imbalance in Biolabs Orange). However, it still gives me an error ...
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8 views

Pre-process 'standardize' function not working correctly

I am running an Orange workshop with 10 participants. When I use the 'standardize' function in the 'pre-process' widget, the data distributions of only some participants is not standardized. The mean ...
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1answer
19 views

Cluster Hyperspectral Images in Orange

Orange has a hyperspectral dataset called "liver cirrhosis" and you can visualize the hyperspectral image using the hyperspectral image widget. However, I would like to perform various ...
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51 views

Using if statement as a model in orange

I am seeking to evaluate logistic regression against a rule-based (nested if-else statements) classification in Orange. The steps I've taken to investigate this are as follows: I could not identify ...
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1answer
68 views

Extracting text into columns

I have a set of customer reports, each is in ms word file. they are all in a similar pattern, for example they start with Name: --, Age: --, Date: --, etc... is there a way to extract particular ...
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45 views

Orange ROC analysis widget [closed]

ROC analysis widget has an option to change prior target class probability. I'd like to know, when and how it should be used. Playing with it changes the slope of iso-performance line. Each classifier ...
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1answer
111 views

Error using corpus widget in Orange v 3.25.0 text mining and no import document option?

I am experimenting with Orange data mining tool. When I use the 'Corpus' widget from the text mining section it gives me the error: [![Corpus widget error][1]][1] I ...
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1answer
121 views

P-values in orange data mining

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

SAS Eminer vs Orange on core ML objects

This question is on capability comparison on parameter - Machine learning or data science objects and functionalities, between paid software as SAS Eminer or Rapid Eminer VS free shipped ...
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1answer
26 views

Geo Add-on Choropleth Widget not found

I am trying to create a Choropleth map using the Chorolpeth widget from the Geo Add-on in Orange. However, this widget is not appearing? Any ideas? My current version: Orange version 3.24.1 for ...
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57 views

Trying to use term document matrix as input to orange 3

I have a CSV file that has tokens as columns and documents as rows, where the rest of the cells are ints that represent term frequency. I'm trying to use this as input into Orange 3, but Orange 3 ...
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30 views

How can I map category values to , e.g., increasing numbers (for anonymization purposes, say) in Orange?

I have a dataset that contains data that needs to be preserved for e.g. clustering purposes, but whose concrete values do not matter. For example, order numbers or serial numbers with lots of ...
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88 views

Topic Modelling LDA - Small dataset

I'm trying to analyze a corpus of 100 texts with the topic modelling widget of Orange using LDA algorithm. When I increase the number of topics, they repeat themselves so I have in output some ...
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1answer
116 views

Visualizing categorical data in scatter plot with Orange (version > 3.18)

Why in Orange versions after 3.18 is not possible to visualize categorical data in Scatter Plot widget?
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1answer
76 views

How can I “export” a model from Orange once I have prototyped a solution?

Using Orange, I would like to use the underlying python model within the control system of my device. The device is a simple machine which is not connected to the internet. My intent is to use the ...
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1answer
91 views

PCA and orange software

I am analysing if 15 books can be grouped according to 6 variables (of the 15 books, 2 are written by an author, 6 by an other one, and 7 by an other one). I counted the number of occurrences of the ...
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1answer
113 views

Orange Geo Map does not show background map

We are running Orange with our students and most of them are having problems with running the Geo Map widget. It does not show any background map. In the bottom an error message is displayed: ...
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1answer
45 views

Suggestion for a better way to organize data to generate frequent item-sets?

I have a data of a bag of words in a document. The data has 3 columns: {document number, word number, count of the word in the number}. I am supposed to generate ...
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24 views

Does Orange allow you to change the decision threshold in modelling widgets?

I can't seem to find an option with the modelling widgets for Orange to allow changes in the decision thresholds. Is this option available? Thanks.
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27 views

How to upload SOFT files in Orange?

I have a dataset which I obtained from NCBI, but it is a SOFT file. When I upload the SOFT file to the file widget in Orange, it cannot be uploaded. Is there a way to upload SOFT files in Orange?
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55 views

How to save data table in Orange3

I've setup a workflow in Orange3 and have tested some models. Now, I have the results in a Data table widget and I'm wondering if there is a way in which I can save the output of said widget? I've ...
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2answers
373 views

Is there Orange support for MySQL and SQLite?

I would like to be able to directly access both MySQL and SQLite databases as part of an Orange workflow. I see there is support for PostgreSQL and (possibly)
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1answer
1k views

What is Orange all about?

I read a lot about Orange here in the forum. I know that it is a software developed at the University of Ljubljana. I guess it has some kind of GUI which makes it a "cheap and easy" way to ...
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46 views

Import data from URL [closed]

I put a dropbox link to the URL box in the File widget and the data got imported perfectly. I saved the workflow that I would like to share with my team. But when I reopen the workflow, the URL link ...
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17 views

tsm_system_time extension not available on Azure Postgresql [closed]

The tsm_system_time extension is not available on Azure Postgresql. Anyway to use Orange without this extension on the server?
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41 views

How does orange encode categorical values for a neural network? What function does it do and how?

How does orange encode categorical values for a neural network? What function does it do and how? I can not find it in the code.
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0answers
181 views

Orange3 / python script / scipy interpn

I tried to create a learner using the Orange canvas script from the Python script widget, but I have not been able to find an effective example. What I would like to do is: 1) Create a learner based ...
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76 views

Orange widget with OpenCV setMouseCallback

I am designing an Orange Widget for facial recognition. I would like to draw a rectangle around faces captured in video by setting mouse events with ...
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0answers
95 views

Importing Orange Pickled Models in Jupyter

I am doing some testing with geoscience data and a few supervised methods in Orange. I have been saving these models as pickle models, but I would like to import them in my Jupyter notebook. How can I ...
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54 views

Regarding the number of iterations functionality

I have a query regarding the number of iterations functionality in Orange, which is available with several widgets. For instance, in the neural networks widget, the maximum number of iterations is ...
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0answers
52 views

Manually changing coefficients of a model

Is there a way to manually change parameters of a model in Orange 3? I have a dataset and trained a logistic regression model on it. Now, I can alter the coefficients (beta values) of the logistic ...
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73 views

Orange Biolab Pivot Table widget - missing

I downloaded most recent version of Orange. I can not find the Pivot Table widget anywhere. When right clicking on the search menu shown, it does not appear anything when writing Pivot Table phrase. ...
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39 views

Can Orange read an excel file on Sharepoint or Onedrive? [closed]

I would like to share my Orange file through a team SharePoint site, including its linked (excel) datafile. Is this possible?
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0answers
76 views

Text Mining with Pubmed Widget Orange

When I was running the text mining I did not have an issue for 57 different searches. I was able to retrieve all of the records regardless of how many there were. Until these 2 errors popped up. I ...
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1answer
112 views

Orange release notes

What is the best way to understand changes made in new releases? For example, Orange 3.21 came out recently and Iā€™m eager to understand any prominent fixes or modified features.
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0answers
197 views

coefficients from decision regression tree

I have a data on which I apply decision regression tree since it gives better numerical values as predicting house prices. I have almost 45 features in which price is the target value. With linear ...
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1answer
86 views

Comparing files (text sources) in Orange

What is the best method to compare text files in Orange? How do I find the difference or similar between two texts and relations between main nodes?
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1answer
331 views

Predicting house price using linear regression [closed]

I'm trying to predict a house price using linear regression method. I gather the real data from a real estate website. I have some features and two numerical value in which the price is the target ...
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74 views

Use sentiment analysis on word level (aspect level)

I am trying to use Orange 3.20 Text Mining nodes to classify sentiments using a lexicon approach (either using the Method from Liu Hu or Vader). After selecting the columns, I can see the documents ...
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203 views

How to create corpus file?

I have text data in .xlsx or .txt files. How do I convert them to a corpus file (.tab)? I would like to use the corpus file with Orange's text add-on.
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1answer
215 views

Does orange transfrom categorial variables into dummy variables when using hierarchical clustering?

I am using Orange to cluster a large amount of data consisting of three attributes. Each attribute only contains categorical unordered variables. My question is does Orange transform categorical ...
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39 views

Orange 3 - How can a String feature behave as a coefficient?

I'm studying machine learning with data. I have a table including features and a target variable which is the price as in the following. When I want to figure out the coefficients to obtain linear ...
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1answer
273 views

Modify value of data in Orange

I am new to Orange and it seems very useful for conducting exploratory data analysis. One question I have is - can we use a widget to modify some values in the dataset? For example, several numerical ...
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52 views

Unable to Print or Save Predicted Results in Orange?

I have applied some models (Logistic, Tree, SVM, Neural Network, etc) in order to predict my results. However, when I printed or saved my predicted results, I was unable to print the Complete ...
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3answers
793 views

Unbalanced target variable in Orange, how do I balance it?

So I want to perform a predictive model to predict churn. I have 2 datasets, one with churn and the other without (so I can later perform predictions). The issue is that I think my Confusion matrix ...

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