Questions tagged [r]
R is a free, open-source programming language and software environment for statistical computing, bioinformatics, and graphics.
1,067
questions
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1answer
5 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
30 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
13 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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0answers
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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2answers
16 views
Using gsub to extract data [closed]
I have a data set such as
x<-c("ID=12;gene=gfp;product=protein","ID=15;gene=rfp;product=protein","ID=15;gene=bkr,product=siRNA")
I want to extract just the gene. I have been trying to use gsub. ...
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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
14 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 ...
1
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1answer
16 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
27 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:
...
0
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1answer
27 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 ...
1
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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 ...
1
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0answers
40 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?
...
1
vote
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 ...
0
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3answers
32 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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0answers
8 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 :
...
1
vote
1answer
32 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 ...
0
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0answers
12 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, ...
4
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2answers
67 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 ...
0
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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 ...
0
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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 ...
1
vote
1answer
34 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 ...
0
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1answer
23 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 ...
1
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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 ...
2
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0answers
49 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 ...
0
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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
votes
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
votes
0answers
27 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
vote
1answer
41 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 ...
0
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0answers
26 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 ...
0
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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 ...
0
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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
votes
1answer
21 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
votes
1answer
24 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
votes
0answers
59 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 ...
0
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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 ...
2
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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 ...
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0answers
16 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:
...
0
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0answers
39 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:
...
