Questions tagged [r]

R is a free, open-source programming language and software environment for statistical computing, bioinformatics, and graphics.

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10 views

Extra Alignment Error with KableExtra in R-markdown

I am relitively new to R and R-Markdown. I am receiving an error message of ! Extra alignment tab has been changed to \cr. \endtemplate In Table 4. I do not know what the error is telling me, ...
4
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2answers
101 views

R has {drake} which makes it easy to make reproducible data pipelines. Does Python have a similar package?

See R's {drake}. It allows you to define a reproducible pipeline ...
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1answer
25 views

xgboost in R have different results compared to boosted decision tree in Azure ML

I have a small data set (4000 records with 10 features) and I used XGBOOST in R as well as Boosted Decision Tree model in Azure ML studio. Unfortunately the results are different. I like to optimize ...
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1answer
38 views

SQL and JSON database - R

I have a database (PostgresSQL) which looks like this: ""results"": {""WEBS"": {""WEBS_4"": [{""ip"": ""XXXXX"", ""value"": ""YYYY""}]}} I would ...
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13 views

POS extraction using CoreNLP

I have a corpus of windows related documents, for which I need to extract nouns and verbs. However, it is required that I keep certain windows specific words such as "inline hooking", "instruction ...
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2answers
53 views

Turning R scripts into a “data science tool”

I have R scripts that process a client's datasets (make figures, summary tables, etc). I'd like to package these scripts into a standalone program, aka data science tool, that I can give to the client ...
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1answer
28 views

How to perform logistic regression in R with grouped data?

Say I have a categorical variable with 2 levels, and for instance 289 people fall in level 1 and 386 fall in level 2. How would I go about modelling such a variable as a logistic response? All ...
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13 views

Use sequential pattern mining rules to predict next window of a dataset

Suppose that I am performing Sequential Pattern Mining (maxgap = 1, i.e. rules for consecutive windows) and I ran the following code from arulesSequences in R Studio to determine significant rules ...
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0answers
18 views

Sapply is not working like for loop

sapply(c(2:5), function(y){ x[y,]<-x[y,]-(x[1,]*x[y, 1]/x[1, 1])}) for (i in c(2:5)){ x[i,]<-x[i,]-(x[1,]*x[i, 1]/x[1,1])} Can someone explain to me why ...
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0answers
59 views

Tools for reading data from large, irregular csv files (aka excel file hell)

I have a csv file with 1000 columns and 50 rows that was collected over a few months. Embedded randomly in the file are ~1000 small datasets with semi-standard formats (some columns differ, so does ...
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1answer
23 views

How to get a output of a hidden layer of a single-layer LSTM

How can get the hidden layer outputs in a simple one-layer lstm? ...
2
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3answers
119 views

References for longitudinal data analysis

So my goal is to study longitudinal data (data in time series) by applying some data mining techniques. Ultimately I want to be able to "predict" outcomes. For example, a study of patients along the ...
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0answers
9 views

What would be a good threshold number to convert some categories to Not Specified

The current topic is derived from this topic: https://community.rstudio.com/t/39722 (optional to read). I have the following dataset: myds : ...
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0answers
29 views

Features selection with a lot of dummy variables in R

I am performing features selection on 3849 dummy variable (one-hot encoding) using Boruta algorithm and the algorithm is taking forever to run. Is there a faster way I can perform features selection ...
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1answer
57 views

R stem and leaf values

How to make a stem and leaf plot with the following data in "R": 1717 1719 1645 3739 3024 3664 3830 2991 2430 2730 3469 5086 2119 3021 3292 2844 3426 2067 3215 2767 3124 2573 2840 2449 2584 1505 1390 ...
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17 views

R- stem and leaf plot [duplicate]

I am having trouble constructing a stem and leaf plot in "R" The data is: 1717, 1719, 1645, 3739, 3024 (This is only a subset of a larger sample but it is sufficient to show my problem) The output I ...
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0answers
28 views

Exploratory Data Analysis for Big Data with continuous and categorical variables (mixed data types)

I have a dataset with 28 variables (6 continuos + 22 categorical). I'm using ...
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0answers
20 views

Table flattening with spread in R

I am trying to use the spread function in dplyr to "flatten" a table but it does not appear to be working as intended. Example table: I am trying to flatten this one so that each Record Number is ...
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0answers
3 views

how to replace loadings in factanal object in r

I am trying to create a diagram but the function for it from package library(semPlot) takes an object. I can use factanal object or many other objects from FA packages. I chose factanal for ...
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1answer
24 views

Why the Logistic regression model trained with tensorflow performed so poor

I trained a logistic regression model with tensorflow but the accuracy of the model was so poor (accuracy = 0.68). The model was trained using simulated dataset and the result should be very good. is ...
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1answer
35 views

Correlation Matrix Issues: Can't Convert Variables to Numerics

QUESTIONS: Can you tell me how I can convert int and factor variables to numeric variables in R? Can you tell me why ...
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0answers
64 views

Features reduction for the not correlated data set

I am working with classification problem on a training data set, which have 100 features. All the features in pairs haven't visible correlation. One can see it in the example pair plot for the some of ...
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0answers
21 views

Are application assignments in Datascience common practice?

this might seem off topic, but I hope this question will be tolerated. I was recently asked to help a friend with an assignment in the process of applying for a new job as data scientist. And ...
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0answers
17 views

Packages for regression presentation

I have a linear regression model with 20+ variables and am looking for the best way to present my results in R Markdown HTML. Are there any R packages that make significant coefficients stand out and ...
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0answers
18 views

How do I use LIME in R to explain a Model created in KERAS?

I have created a model in KERAS R, using a data table, with the following script: ...
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0answers
51 views

Custom Cohen's Kappa metric for R in Keras is always zero

I created my own custom metric (Cohen's Kappa) in R using Keras backend. I defined the metric as follows: ...
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0answers
20 views

How can I create a terrain that looks like a staircase in R

I am trying to develop a terrain in R that looks like a stretched out staircase, i.e. the tread is the horizontal parts that I want to place buildings on, while the rise should be gentle sloping (not ...
2
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0answers
91 views

Can you do automated feature engineering in R?

Since now Python has its own deep feature synthesis library, is there anything similar available in R? I know of bounceR but I'm not sure if it does the job as DFS does. Is anyone aware of anything ...
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1answer
32 views

Caret “train” or special package

I see that there is an XGBoost package as well as XGBoost option in the "train" function in Caret. What is the difference between these two options, is it that they provide different settings? More ...
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1answer
77 views

How Retail Analytics Project Can Be Done?

I have a project and I couldn't understand what I have to do because I am new with retail analytics. They said "Our goal is to measure the effects of promotion on sales" and "Your goal is to model ...
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1answer
29 views

Median of a list of frequencies

I have a list of groups and the frequencies of every group. E.g. ...
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0answers
10 views

Further analysis after topic identificatio

Using lda to find topics ...
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1answer
28 views

Which are the appropriate prameters for lda modeling?

I try to implement in R test for appropriate metrics for lda. Here the way I try to use LDA ...
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1answer
16 views

Conditional Function in R [closed]

I have an R function for (i in 1:10) that reads in data and performs some cleaning. Is it possible to write a flexible statement to execute certain parts of the ...
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1answer
31 views

Measure degree of heteroscedasticity [closed]

I analyzed my time series using Breusch Pagan test and observed the presence of heteroscedasticity in it. After box-cox transformation, I again tested the time series using Breusch Pagan test. The ...
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0answers
66 views

Save xboost model from R as Python pickle

I trying save R model to pickle, but I getting error Evaluation error: Unable to convert R object to Python type. ...
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1answer
29 views

R package vs REST API

I have a logistic regression algorithm in R to predict irresponsible users. I need this to be as flexible as possible for any market. I would need to use the logistic regression algorithm to ...
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1answer
87 views

Error loading tidyverse in R Studio - No broom package

I'm getting numerous errors when trying to install packages, namely tidyverse and ggplot. The error is of the form are always in the form: ...
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0answers
11 views

how use RBF for primal model of svm?

I know if we want to solve primal model of non-linear SVM, we have to generate new features. for example for kernel (1+xz)^2 for primal problem for any pair of features x1 and x2 we have to generate: ...
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1answer
37 views

How to execute a git project with different input data?

I would like to run this project and receive result from this project However I have problem to execute the step mailcorpus.json created by executing the sql script data/get_mail_corpus.sql on ...
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1answer
30 views

Merging three different customer segmentation systems into one

I have been given a task where I have three existing customer segmentation systems (rule based e.g. if customer spends X in Y amount of time AND whatever then put in top spender segment is one segment,...
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2answers
91 views

Splitting training and test set with financial data

I am using trees algorithms (decision tree, random forest and XGBoost) to forecast the sign of the returns in the stock market (classification). I am using this article as a reference: http://...
4
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1answer
71 views

Reticulate vs Python

I have gotten very used to coding in R and especially in RStudio. I like that interface. Nonetheless, I have some work that I ought to do in Python. I know that I can run Python code in RStudio if I ...
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0answers
19 views

Interrater-reliability for several items at interval or ordinal scale with 2-3 different raters

I would like to compute the interrater-reliability in R for a sample (n=150) in which each individual was rated by 2 to 3 raters (in ca. 40% of the sample 2 raters, 60% 3 raters). Raters were ...
3
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1answer
155 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 implement ...
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0answers
33 views

How to compare 2 elements of a column with each other?

I am using R. I have a column with 4 elements {car, bus, walk, train}. I would like to compare the car and bus with each other with the help of the 3 other columns. ...
0
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0answers
154 views

R SVM Predict - Error in predict.svm: test data does not match model

I started with a data frame of 23,515 rows and 3 columns. I split the data 70/30 into training/testing. I am fitting a classification model with SVM from the e1071 package to predict variable MISSING. ...
0
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1answer
29 views

How to interpret two continous variables output using GAM?

I am sort of new in R and learning day by day. I really need help with GAM. I have to find out whether association is linear or non-linear by using GAM. The predictor variable is temperature at lag0 ...
1
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1answer
25 views

How to find what events cluster together?

I have a data set that looks at a five-year timespan of peoples' lives and indicates if specific events have occurred (Divorce, Birth of Child, Health Shock, etc.). ...
1
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1answer
34 views

About Hadley Wickham paper on tidy data

I read this paper and understood it very well, but I miss negative impact that will happen if we don’t fix the 5 types of messy data introduced in the paper (page 5), or even how fixing them will make ...