Is there a function in R that scans a QR code in a .jpeg image?
I have a column in a data set of these .jpeg images. They are links to Amazon Web Services.
View ArticleIs there an efficient way to backward search a large vector in R?
I have a vector of 10+ million elements. I need to find all elements satisfying a given condition A (e.g. X < 2 at rows i %in% c(6,10)). From each of these elements I need to skim the vector...
View ArticleWrapping dplyr filter in function results in "Error: Result must have length...
I'm learning R for data analysis and using this Kaggle dataset. Following the movie recommendation script works, but when I try to generalize a dplyr code by making it a function I get an error:I've...
View ArticleHow do I choose a denominator based on the values in another data frame?
My task is to calculate the ratio of academic credits per student/expected academic credits (with no courses failed) during the time period. Since I have got limited access to university databases, I...
View ArticleAutomatically reorder factor levels in dplyr
I have many factor columns, spread randomly throughout a data.frame. These factor columns have 6 levels ranging from "Very Strongly Disagree" to "Very Strongly Agree"I am looking for a way to...
View ArticleAveraging wind direction in r
I have hourly u and v wind components, and I’m having trouble to aggregate it to the daily level. In principle, I thought that I could just take the mean of U and V wind components and find the...
View ArticleHow can I have R utilize more of the processing power on my PC?
R version: 3.2.4RStudio version: 0.99.893Windows 7Intel i7480 GB RAMstr(df)161976 obs. of 11 variablesI am a relative novice to R and do not have a software programming background. My task is to...
View ArticleHow do I solve the following error?Input must be a character vector of any...
I am working on a R project. The data set I used is available at the following link https://www.kaggle.com/ranjitha1/hotel-reviews-city-chennai/dataThe code I have used is.df1 = read.csv("chennai.csv",...
View ArticleSpecifying number of trials, bootstrap
For an assignment, I am applying mixture modeling with the mixtools package on R. When I try to figure out the optimal amount of components with bootstrap. I get the following errorError in...
View ArticleFix log plot in R
I want a plot with a log scale in x-axis and a "normal" y-axis. I got a plot but I see a strange thing on my y-axis which I couldnt figure out. g <- ggplot(mtcars, aes(mpg, disp)) + geom_line(size =...
View ArticleInterpretation of Sum Sq in ANOVA with numeric independent variable
I don't know how to interpret the Sum of Squares in a numeric independent variable.summary(aov(Petal.Width ~ Petal.Length + Species, iris)) ## Df Sum Sq Mean Sq F value Pr(>F) ## Petal.Length 1...
View Articlevariable text contains multiple patterns
I need to know if the match variable is contained in the url variable:df1 = data.frame(match = c("2234436803329252","460696711422302"), stringsAsFactors = F) df2 = data.frame(url =...
View ArticleR data frame merge by multiple columns in df.x
Is it possible to merge by multiple column in df_aFor example if I have df_a and df_b, where my df_a is looking likeSKS1 SKS2 UXCC77 NA UXCC00 NA UXCC00 UXCD00 UXCD00 NA UXCD60 NA UXME10 NA and df_b is...
View ArticleR functions of shp
I'm trying to read my shapefile in R and still getting an error messageI installed these librarieslibrary(sf) library(ggplot2) library(tmap) library(tmaptools) library(leaflet) library(dplyr)...
View ArticleAvoid rendering of specific .md files from blogdown::serve_site()
I have a file located at content/post/data_for_posts/my_file.mdI have it there because it's quite easy to do htmltools::includeMarkdown("data_for_posts/my_file.md") and recycle this file in different...
View ArticleTufte-style beamer presentations in Rmarkdown?
I'd love to make "beamer presentations"Tufte-style in Rmarkdown. There I can put in the YAML header either output: beamer_presentation or output: tufte::tufte_html: default tufte::tufte_handout:...
View ArticleTrying to implement recursive DBSCAN in R
I am trying to implement RDBSCAN in R. is there anyone who can implement RDBSCAN in R? Its very nice of you if you could share the code.
View ArticleHow can I perform constrained randomization in R, nested by custom number of...
In short: I want to achieve randomization of samples in a nested manner, given an arbitrary number of factors. Background In several types of biochemical analysis there is systematic bias in response...
View ArticleGGPlot2 called twice inside a function only produces one plot
I am fairly new to ggplot2, so this may be a simple mistake that I am not aware of.I am using this function to create violin plots of some data of mine. The data in question is Log fold change between...
View ArticleHow do I create a summary statistic for multiple years and variables?
R newbie here. I am working on a project for which I need to combine multiple years of data into a single summary statistic for each column. For example, I have five years worth of data that need to be...
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