Questions tagged [r]
R is a free, open-source programming language and software environment for statistical computing, bioinformatics, and graphics.
902 questions
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1answer
11 views
Grouping and summing with r
I have a data.frame that contains two columns that I want to group and sum the direct labor for employees.
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0answers
8 views
R - What's the machine learning/non-machine learning way to identify points from intersecting lines in an image?
Let's say I have a image of several intersecting lines (left). Is there a way for R to detect where the lines intersect and overlay points on them (right)?:
The goal is to import an image of fish ...
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0answers
14 views
Predict on sparse categorical data
I have an xgboost model trained on a sparse matrix of a mix of categorical and numeric variables. Passing new data to have the model evaluate doesn't always work because when that new data is ...
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0answers
18 views
How can I extract bootstrap generated datasets into individual dataframes?
I am having a bit of trouble understanding Bootstrapping and what/how I can manipulate the bootstrap created dataset.
This is all in R
My original dataset is structured like this:
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0answers
18 views
How to compute a rate equation on bootstrap datasets
I am having a bit of trouble understanding Bootstrapping and what/how I can manipulate the bootstrap created dataset.
My original dataset is structured like this:
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0
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0answers
11 views
converting sql to width bins in r
I want to create a histogram out of the range of a column named surfacearea with country data frame. I made an sql file
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0
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1answer
19 views
finding the percentage > x with r
Trying to locate the names of countries in my data.frame where the most spoken language is not an official language. My columns data.frame is World. The column <...
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0answers
9 views
Working on calculating the correlation and covariance between attributes
Calculate the correlation and covariance between two attributes
data.frame is country, two columns are surfacearea and population. My code is:
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0
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0answers
14 views
Trouble with grouping by and counting in r
I have a data.frame called world. This data frame lists countries in column name.y, I have a column for languages named languages. I need to List the names of countries where more than 4 languages ...
0
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1answer
31 views
error trying to build a histogram using r with the rStudio application
Using ggplot2 I am attempting to create a histogram. I have a column that is full on the continents. I need to add all the continents which I attempted to do with the aggregate function.
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1
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1answer
24 views
RNN package and problems with “Predictr”
I have two questions about how to use R's RNN package, specifically the trainr and predictr functions.
Let's suppose I have a time series of 4000 steps for 5 different variables.
How should this be ...
0
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1answer
14 views
found \N in my data does not count as missing values in r
So scrolling through my columns I find \N embedded. I need to count them, but I get an error. Would it be considered a missing value, it's new to me.
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-1
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1answer
18 views
Looking for second opinion on checking that attribute in data frame is unique using r
Check whether attribute name in city is unique (i.e. each city has a different name). data_frame is city with a column called name.
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1
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1answer
126 views
+50
Select behavior dependant with other factors and its formalization
I'm studying occurence of Behavior11, Behavior12,Behavior2,...
-1
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1answer
21 views
rStudio changing lower case to upper case
trying to convert column from lower to upper not working
#Change all city name in city to uppercase.
city %>% `colnames<-`(tolower(names(name))) %>% head
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votes
1answer
19 views
merging 3 csv files with r
I have 3 csv files I would like to combine with rStudio, but get an error. Any assistance is appreciated. code looks like this.
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1
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1answer
65 views
+50
A few questions to understand a random forest blog
I'm trying to understand a nice blog on the trade-off between sensitivity versus specificity with the random forest and logistic regression models. I have a few questions:
1) The blog used a 10 fold ...
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0answers
21 views
which algorithm to use for classification
I am a student and for this question is for my project. I have a dataset with 45000 rows, 16 variables + class variable. The classification is a binary classification with Yes and No. the problem is ...
-1
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1answer
28 views
How can I run tidyverse package? [on hold]
I installed the package "tidyverse", but when I am trying to run it, it give me this answer:
package or namespace load failed for ‘tidyverse’ in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck ...
-1
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0answers
6 views
Clustering using subtractive clustering technique in R [on hold]
can anyone please help to perform subtractive clustering technique in R with an example
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1answer
11 views
Mutate with custom function in R does not working
I have a data frame, containing a column "Frequency". Freaquency column has value like "Year", "Week", "Month" etc. Now I want to create a new column based on Frequency column where "Year" ...
0
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1answer
28 views
Trouble doing a simple Box Plot
This is a problem that I keep having when trying to do a boxplot in R. From what I can see the code I am using should work, not ...
0
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1answer
18 views
Caret + RStudio: Error “Please make sure `y` is a factor or numeric value” when training
I'm new to Caret and I've been trying a couple things to get the hang of things. But this error happened to me and I'm not sure why.
I've been trying to train a model with some data I got from "...
1
vote
1answer
47 views
R mice doesn't give a 'valid' sollution
EDITED: See below for additional information..
TL;DR: How can I add missing data in a dataset like the sample in a way that it doesn't deviate much from the original dataset.
ORIGINAL:
I have a ...
-1
votes
1answer
24 views
Error while using predictive modeling [on hold]
I want to know that which model to use for predictive analysis if both my independent and dependent variables are categorical.
Thank you.
1
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1answer
16 views
How to make a Power Spectral Density Plot in R
I have a time series point process representing neuron spikes. I have computed and plotted autocovariance using acf but now I need to plot the Power Spectral ...
0
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0answers
15 views
Choosing model for predictive analysis in R
I have a quick question here: I am new to R and have used titanic dataset for predicting the survival rate using random forest model, SVM. Also the "Survived" Variable has only two values(Yes or No). ...
-1
votes
1answer
28 views
How to Plot a two line graph out of three tabular columns in R
This definitely not what I wanted. I'm learning to plot, but I want my x value to be dates and my y value to be line graphs telling the story of projected vs performed values. So far here is what I ...
1
vote
1answer
33 views
removing percentage signs with rStudio
I am learning rStudio and have a tutorial that wants me to remove the percent sign. The code they want me to use is:
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1
vote
1answer
21 views
error length > 1 and only the first element will be used?
I'm new i data mining and R, and i'm working with a dataset and trying to remove the "white space" elements. i tried to create a function to do that.
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2
votes
1answer
47 views
Visualizing word embeddings
I am working on a text-classification problem, and trying to understand how to work with the tensorboard projector for an embeddings layer in Keras. Borrowing an example from the Deep Learning with R ...
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0answers
16 views
Is there anything like an GUI/IDE for data science - automatically generating graphs and statistics etc?
In software development, IDE's (interactive development environments) help programmers by automatically generating a lot of useful stuff while debugging - variable values, call stacks, call graphs, ...
2
votes
1answer
42 views
Binary classification model with time series as variables
This is probably a simple question. Assume I'm interested in modelling a binary variable, with various covariates, including ones that are time series observations. In the usual modelling approach, ...
0
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0answers
11 views
LDA topics and differences between groups
I´m using Topicmodels(R-Package) and I want to observe differences between groups (I have a variable named "age groups"). I have thousands of customer reviews and now that I have 30 topics using ...
1
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0answers
43 views
Using a custom R generator function with fit_generator (Keras, R)
I'd like to train a convolutional network to solve a multi-class, multi-label problem on image data. Due to the nature of the data, and for reasons I'll spare you, it would be best if I could use a ...
1
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0answers
24 views
How can I create a function that returns a vector in R? [migrated]
I want to create a function that returns its result as a vector. More specifically, a function that returns the divisors of an input value and places them inside a vector.
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1
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1answer
68 views
SVM model classifying into one class only, after standardization
I'm trying to use SVM in R (e1071 package) to classify samples as normal or tumor. I have two separate data sets - Training (~50 samples, 100 features) and Test (~60 samples). These data sets are ...
0
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1answer
17 views
[R]Fuzzy C-Means, different between ppclust vs e1071?
no. of cluster = 10, data points = 6000
library(ppclust)
cm <- fcm(x,centers = cen)
takes ~ 10 minutes
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0
votes
2answers
28 views
Finding interaction
How do you find the interaction between a continuous and a categorical variable? I have tried using ggPredict but it doesn't seem to work if there are more levels.
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1
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2answers
37 views
How to model & predict user activity/presence time in a website
I need to make a prediction model based on some historical data from a website's user login system. Suppose my dataset has some features like user login time and logout time for each day for a ...
1
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0answers
30 views
Increase Specificity of a model using SMOTE arguments from DMwR package in R when training data is unbalanced
I'm working on a binary classification problem and training data which I'm using is unbalanced.
I used SMOTE function from DMwR ...
1
vote
1answer
28 views
Pandas, R, and interoperable data frame formats
I want to have a single format which is compatible both with R and Python's Pandas (and preferably, other things like Stata and SAS), for which I will not ever need to impute whether things are ...
1
vote
1answer
17 views
How do I use the model generated by the R package poLCA to classify new data as belonging to one of the classes?
For example in the election example from the documentation, https://cran.r-project.org/web/packages/poLCA/poLCA.pdf If I create a new set of answers to the questions, how can I use the poLCA model to ...
0
votes
1answer
10 views
Standardizing Vegas odds for a randomForest
I'm sorry I don't have reproducible code, but I have a pretty specific question that I can't find an answer to.
I'm using randomForest to project NBA statistics. ...
3
votes
2answers
48 views
How can I use two different datasets as a training model for svm
I know that you're supposed to scale your test data using the parameters (mean and stdev) from your training data. This is relatively simple; but what if the number of samples is limited in one ...
1
vote
1answer
46 views
Can I use categorical and numerical data variable at the same time in randomForest in r?
I have data in which few columns contain categorical data whereas remaining columns contain numerical data. I want to use random forest regressor from the randomForest library in r. So does this ...
3
votes
3answers
56 views
Folds in Cross validation
I am performing 10-folds cross-validation to evaluate the performances of a series of models (variable selection + regression) with R. I created manually the folds with this code.
At the moment I'm ...
1
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0answers
23 views
randomForest in R - skip test
I am working with package randomForestin R for predicting a price in an hourly basis.
For creating the model, after partitioning the dataframe, I use the following ...
0
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0answers
38 views
R package used for Sampling techinque such as over,Under, both, SMOTE to balance multi-class target variable
given below is an example of my data frame.
Target Class
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Now my target class ...
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1answer
49 views
I need to force my random forest model to learn one crucial relationship between features. How can I achieve that?
Say, given 10 independent features as input to my RF model, when feature 1 and feature 3 are 100 (or less), my model output must be 5 despite the values of the other features. How can I teach that ...
