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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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10 views

How can implement in orange matthew correlation coefficient [closed]

I have intalled orange 3.26 and I want to calculate mcc (matthew correlation coefficient) How can implement on orange
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Can Orange be used in multicore mode? [closed]

I was wondering if Orange can be used in someway multicore. Trying a huge dataset, seems using only one core.
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19 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
45 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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12 views

Orange - Plotting Swept Data

I'm becoming more and more familiar with Orange for data visualization. I've been making great use of the Scatter Plot widget to visualize correlations and even wafer maps. I understand that in ...
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22 views

Orange ROC analysis widget

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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12 views

Send one row at a time from one data table to another data table using the Orange Data Mining python script

I would like to know if there is a possibility to make a loop somehow work on orange, where this loop consists of the script (1) pulling one line at a time from the database and throwing it to the ...
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15 views

Orange 3.25 Normalize features Center by Mean and Scale by SD

I am using Orange 3.25 on windows 10, But while I DOWNLOAD time series add on preprocessors I drag Normalize feaures, I dont see Center by mean and scale by SD Please help me how to get that .
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1answer
44 views

Why do i get error when I use corpus in Orange v 3.25.0 text mining widget and no import document option?

I am experimenting with Orange data mining tool. When i use 'Corpus' from text mining. It gives me error. . I tried many things, but still unable to resolve this issue. Besides that, In text mining, ...
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1answer
49 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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13 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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17 views

GEO Choropleth not found

I'm Trying create, from Geo add-on, a Chropleth map in Orange version 3.24.1 for windows . But, this widget just don't appear... some tip?
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46 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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24 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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12 views

Why does the Moving Transform widget not have any effect in Orange?

I am using Orange 3.24.1. When I connect a Moving Transform widget to a CSV File Import widget and look at the results e.g. via a Line Chart widget or via a Periodogram widget, I do not see any ...
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31 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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19 views

How to reshape long data to wide data format using Orange?

I have a table with 3 columns: Time, Tagname, TagValue. I would like to split the TagValue column by Tagname so that the resulting table has Time and each Tagname in a separate column and the ...
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1answer
76 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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21 views

Orange SVG Output from Hierarchical Clustering

The latest version (3.24.0) is fantastic in that the hierarchical clustering dendrogram now has scale(s) for output in PDF format (never had this in the past). However choosing output to SVG fails ...
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30 views

Recommendation widgets orange3

I want to make recommendations using orange3. Can't install learners (brismf, svd++ etc) add-ons as they are not available readily on Orange widget catalogue. Can someone help me in installing the ...
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42 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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31 views

UMAP in Orange software

I found orange software to be very easy and useful. I am just wondering whether Orange supports Uniform Manifold Approximation and Projection (UMAP) from t-SNE? Regards, Jothy
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35 views

Neural Network widget in Orange

I would like to know how the data is normalized whenever Neural Network widget is used in Orange. I've already extracted the ANN parameters (weights and biases) and it was not possible for me to ...
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139 views

How do I perform a Kaiser-Meyer-Olkin test (KMO) on Orange?

How do I perform a Kaiser-Meyer-Olkin test (KMO) in Orange? I am trying to reproduce, in Orange, some processing done in SPSS. There I used the syntax below to run a factorial analysis: ...
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28 views

In Orange what do types: class, meta, weight, and ignore mean?

The third row of an Orange data file should give each column one of: class, meta weight, or ignore. I understand ignore and meta are to be ignored. But what do class and weight do? Their docs don't ...
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19 views

How to make table from line chart on Orange?

I have difficulty to summarize the forecasting result using VAR algorithm. I can make the line chart for forecast value with the following future date but I can't make table about how future price ...
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1answer
58 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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25 views

Orange - Different results in Test&Score widget with the same data

I am developing a classification model with Orange 3.23.1 Whenever i run model on the same data, i get different resluts in Test&Score widget. I use cross validation for evaluation. How can i set ...
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1answer
97 views

Orange Geo Map does not show background map

We run Orange with our students and most of them have problems with running the Geo Map widget. It does not show any background map. In the bottom an error message is displayed: "Cannot fetch map from ...
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27 views

How to improve computation speed on Orange?

I need to process huge data sets on Orange 3.23. My Orange workflow contains several widgets in parallel. It seems that Orange launches each process at a time. Is there a way to run several processes ...
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24 views

Widget set incomplete

I'm having a problem with only a subset of the Orange widgets showing up. I'm working on a PC, and have successfully downloaded the latest version "3.23.1". Everything seems to be working fine, ...
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15 views

Are there any public documents/code pertaining to the parameters and configuration for the Image Embedding node/API?

Are there any public documents/code pertaining to the Image Embedding node/API configuration being used to extract the features based on the Inception V3 model? (extract occurs on an unknown remote ...
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1answer
36 views

Can you suggest a better to organise the data to generate frequent itemsets?

I have a data of a bag of words in a document. The data has 3 coulumns : document number, word number, count of the word in the number. I am supposed to generate frequent itemsets of particular size. ...
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20 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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23 views

How to use SOFT dataset 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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40 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
195 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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39 views

Error while importing 'Orange.widgets.data.owpivot'. The widget will not be shown

I installed Orange3 v3.22. When I open it from Anaconda, I get: ...
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12 views

Can data be CLR transformed in Orange?

Good day, I would like to perform a CLR transformation of selected continuous data in Orange, is this possible? I don't see a CLR or log ratio transformation widget anywhere. Would I have to write my ...
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28 views

What is the default method for Orange to deal with missing values in random forest classification?

Good day, I have built a random forest classification model in Orange, but some of my input data (all continuous) are missing. Up to 30% of the data for some variables are missing. I understand the ...
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31 views

Setting Up Training Data to Perform Image classification

I want to use Orange for an Image Classification project I am working on. I have a training image set and separate .csv with columns corresponding to the image (by name) and classifier. Wondering ...
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1answer
689 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 ā€žcheap and easyā€œ way to implement ...
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41 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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0answers
14 views

tsm_system_time extension not available on Azure Postgresql

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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0answers
34 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
158 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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64 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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80 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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48 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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46 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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