Questions tagged [r]

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

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28 views

In a list, find the numbers where they are bigger than the next numbers

I'm using Rstudio. I have a list like below, I want to find all the numbers that are bigger than the next numbers (i.e. numbers on their right hand, I make them bold). 7 7 9 9 9 10 10 1 51 51 53 ...
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1answer
20 views

Customer Segmentation: Should I use a variable, representing a product, that is unpopular in the dataset for K-Means Clustering?

I am working with a data set that, besides customer age and income, tells the balance a customer has in different type of bank accounts: Checking, Shares, Investment, Savings, Deposit, Mortgage, Loan, ...
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0answers
17 views

Splitting training and test [on hold]

I had used this code for data partition: ...
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1answer
11 views

Free API for historical weather US data?

I am trying to retrieve a free R-Python API that provides historical weather data in US. In fact wunderground API is no longer available. Any suggestion?
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2answers
37 views

Correlation Matrix for non-numeric features

Currently, I have dataset with numeric as well non-numeric attributes. I am trying to remove the redundant features in the dataset using R Programming Languages. Note: Non-numeric attributes cannot ...
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0answers
15 views

Reverse of Yeo Johnson variable transformation done by preprocess function in caret package to get original Target and predicted values

I have done a Yeo Johnson transformation by using preprocess from caret package. I have predicted the Target Variable using linear regression. Now I want to reverse the transformation for both the ...
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5 views

Error condition has length > 1 and only the first element will be used [migrated]

I am writing a function so that I can count the number of NAs in the columns I am interested in. Below, pts_au is a balanced panel data set of country-years, ...
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0answers
6 views

Decompose and stl decomposition functions problem when frequency is equal to 1

I am using the library fpp2 in R and using the wmurders time-series to forecast the murders of females in the US. We have a time-series from 1950 until 2004. I actually have a problem defining the ...
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0answers
11 views

Interpretation of hurdle model with negative binomial distribution

I envisage to employ a hurdle model in R, as for instance described here. Question: how I can derive marginal effects from the hurdle model? With linear ...
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0answers
15 views

Fill the missing values (NA) in various columns (independently of each other) using imputeTS package (in particular, na_kalman function)

A friend of mine has recently started working on R-studio and is interested in filling the NA values in different columns using the above-mentioned function. Also, since he intends to run a time ...
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1answer
17 views

Is there a way to aggregate frequency distribution for many runs?

In the following plot I have frequency distribution for each of the fitness values that are shown in thte legend. Each run (x-axis) has a different frequency of each fitness value. The total runs is ...
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0answers
32 views

Why does Caret featurePlot returns returns NULL?

I am trying to use featurePlot of caret in R. This is the code I am using: ...
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1answer
30 views

R packages: How to access csv files in data subfolder? [closed]

I have successfully written an R package and want to ship it with a specific csv file. I placed the file in the data and ...
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0answers
8 views

r - tbart package, allocations function - How can I force a solution without a list of sites?

I am attempting to solve a p-median problem for a given dataset. I can successfully produce a list of optimal candidate sites. However, I am interested in a secondary list of optimal candidate sites ...
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0answers
41 views

Hyperparameter Tuning using Bayesian Techniques

I've been looking into Bayesian optimization for hyperparameter tuning and trying to compare the results I get to those I get using different methods (random grid search). I came across this site, ...
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0answers
8 views

Sample the transaction set with close lift or/and confidence estimate with original set[association rules]

In frequency set mining, for large sets, we can use sample to reduce the calculation while not miss too much for the support using formula: ...
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0answers
11 views

Detect positive and negative changes

Having a dataset like this: What model change I use to show positive and negative transitions between the the 5 variables and correlate them? ...
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1answer
32 views

How do you Show a Difference between Two Groups (Clustering)

I am approaching a data problem. My data set consists of observations of (X,Y) coordinates indicating a position on some grid. There are two groups based on a variable Z. Group A is all the points ...
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0answers
7 views

How to encode factor predictors in prediction models

The response variable as well as all predictor variables in my dataset are factors. I want to build a model for predicting the response variable. As I understand I have to first encode my predictor ...
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0answers
21 views

How to apply bootstrap to knn model in r

I have test data and train data in test.csv and train.csv respectively. train$X are volt to current ratio and train$y are the ...
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3answers
35 views

What is the better to pre-process data, MS-Excel or Python/R [closed]

While handling data, many anomalies occur that might change the results. For example, outliers, missing values, etc. So in this context, what is the better tool to pre process data? A visual tool like ...
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9 views

Error in the train function

I'm building a model and i want to re preocess the data using PCA but i have an error in the train function : ...
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1answer
34 views

how can I replicate working of Multi Label Binarizer from sklearn package in R?

I want to achieve same working of MultiLabelBinarizer from sklearn.preprocessing package in R. I have list of labels for each example (for Predicated and Actual) like below. ...
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0answers
8 views

Labelling through Markov Switching models

I am new to machine learning, in the past I have worked with time series techniques. I have a database composed by the financial time series of SPX, its Exponential Moving average 20days, BBB ...
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0answers
13 views

Structure learning for numerical type of data

Bellow I have some code, where the code works with categorical data but produces the error (for the numerical data): Error in data.type(x) : variable chas is not supported in bnlearn (type: integer)...
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0answers
12 views

thermal images in R

I have a large set of thermal images to process in R. Taken with Infratec IRBIS camera. Is there an R package to import the images directly in R? What are some other ways to get temperature data ...
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0answers
9 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, ...
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2answers
69 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 ...
1
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1answer
23 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
37 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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0answers
11 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
42 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
26 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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0answers
12 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
50 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
19 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
108 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 ...
1
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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 : ...
3
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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 ...
1
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1answer
42 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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0answers
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
27 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
15 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 ...
0
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1answer
22 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 ...
0
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1answer
26 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 ...
5
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0answers
61 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
20 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
16 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 ...