Questions tagged [r]

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

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88 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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17 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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19 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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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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1answer
134 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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40 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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20 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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36 views
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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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47 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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1answer
2k views

GPU Accelerated Data Processing for R in Windows

I'm currently taking a paper on Big Data which has us utilising R heavily for data analysis. I happen to have a GTX1070 in my pc for gaming reasons. Thus, I thought it would be really cool if I could ...
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1answer
30 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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23 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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19 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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42 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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78 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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22 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 ...
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1answer
40 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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0answers
290 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
136 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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12 views
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1answer
31 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
78 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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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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0answers
183 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
126 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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1answer
40 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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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
6k views

Do Data Scientists prefer MACS? [closed]

I see many Data Science (DS) tutorials done on MACS, and many DS blogs recommend MACS as the best developing platform, thus the quote "Data Science is statistics on a Mac" came more than once into my ...
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1answer
3k views

How to resolve “invalid number of 'breaks'”

Code: f_custdata <- gsub(".", "", f_custdata) f_custdata <- as.numeric(f_custdata) hist(f_custdata) Error: Error in hist.default(f_custdata) : ...
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2answers
150 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://...
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0answers
20 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 ...
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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. ...
3
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2answers
3k views

How can we evaluate DBSCAN parameters?

yes, DBSCAN parameters, and in particular the parameter eps (size of the epsilon neighborhood). In the documentation we have a "Look for the knee in the plot". Fine, but it requires a visual analysis....
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1answer
84 views

Linear regression model with (categorical) predictor variables

I used LM model with (categorical) predictor variables on my data in r like this (I have count variable as dependent/target variable): ...
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1answer
99 views

Setting up network communication between R and Python [closed]

I want to share data between R and python via network sockets (I expect the solution to also work for R-R and python-python). I am interested in server being both R and Python side. For now I am ...
0
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0answers
329 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. ...
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1answer
26 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.). ...
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1answer
54 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 ...
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1answer
56 views

caret dummyVars on unseen data

I created my dummy variables, trained my model and tested it as below: ...
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0answers
23 views

Need Help in modeling sequence prediction problem

I am working on a problem where I have a dataset with 50 predictors (all numeric) and one response variable which is a string of words. ...
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0answers
22 views

Is it possible to create nonbinary trees in XGBoost?

I'm looking through the documentation for XGBoost, and I'm not seeing any parameters relating to number of branches per node.
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22 views

R: Difference in understanding of likelihood and Goodness-of-fit statistics

I am trying to fit normal distribution to my data using fitdist. The log likelihood of fit comes out to be -2788549. Since log likelihood is negative it means likelihood value lies in 0 and 1 which ...
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0answers
13 views

Prepping data for association rules mining

I have access to transactional data from an pharmacy claims database. I can easily create the data in the typical format that is a column for transaction id and a separate column for product i.e. <...
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0answers
52 views

Handling different length string features and prediction of these based on other features

I am currently working on a problem where the dataset contains 200+ features (Let's call them the code features, e.g no.of.loops, memoryInst, loadInst, etc and Flags that are used to compile code ...
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0answers
21 views

R: analysis of conditional heteroscedasticity using McLeod Li test

I am using R for McLeod Li test for conditional heteroscedasticity on time series before and after boxcox transformation. The null hypothesis for this test is of no heteroscedasticity. I observed that ...
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0answers
37 views

R: Error using Shapiro Wilk test for multivariate normality

I want to test if my data is multivariate normal. For this, I am using mvnnormtest package and Shapiro-Wilk multivariate normality test. I am passing the data to function as: ...
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0answers
22 views

R: Breusch-pagan test heteroscedasticity before and after boxcox transformation

I am trying breusch-pagan on a a feature regressed using multiple variables as: bptest(lm(V1~V2+V3+V4+V5+V6+V7+V8+V9+V10+V11+V12+V13+V14,data=data)) It shows BP ...
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0answers
44 views

Different approaches for categorical non-ordered data clustering in R

I'm trying to find different clustering approaches for only categorical data in R, so far I found: klaR for kmode cba for rock Hierarchical clustering (agglomerative or divisive) with a categorical ...
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1answer
49 views

How to interpret this summary output in R?

How Do I interpret this summary output in R? Coefficients: ...

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