Questions tagged [orange]
Use for questions about Orange, the free, open-source, component-based, data mining and machine learning software suite.
170
questions
1
vote
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 ...
4
votes
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.
0
votes
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 ...
1
vote
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 ...
1
vote
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 ...
1
vote
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
votes
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?
0
votes
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 ...
1
vote
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
vote
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 ...
1
vote
1answer
43 views
Classification execution time - Orange
Is there any way to find out execution time for classification algorithms in orange?
1
vote
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 ...
0
votes
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 ...
-1
votes
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 ...
1
vote
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 ($AUC$, $CA$, $F1$) ...
1
vote
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
1
vote
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?
2
votes
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.
...
3
votes
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
votes
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....
0
votes
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.
0
votes
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
votes
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.
1
vote
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 ...
1
vote
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;
...
1
vote
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 ...
0
votes
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’ ...
1
vote
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 ...
1
vote
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 ...
0
votes
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
votes
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 ...
1
vote
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 ...
1
vote
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
vote
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
votes
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 & ...
1
vote
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
vote
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 ...
0
votes
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
votes
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
vote
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
votes
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
votes
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
vote
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
votes
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?
1
vote
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
votes
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
vote
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
votes
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
vote
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
votes
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 ...
