Create a column that identifies if all conditions are met
I have a data frame with numeric values. I want to check, for each row if they meet a certain criteria, and create a new column which gives TRUE if all criteria are met. Example criteria are...
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The boundary lines between two polygons seems to be different than the...
I am plotting the boundary of several polygons using the tmap package. The following code is a basic example.library(sf) library(tmap) nc <- st_read(system.file("shape/nc.shp", package = "sf"))...
View Articlecreating Frequency in R
am having this vector of value: [1] 0.9324929 0.9461874 0.9899430 0.8592746 0.9495612 1.0047946 0.9501648 0.8826660 0.9297847 [10] 0.9540155 0.9096408 0.9808021 0.9641611 0.9327183 0.9893001 0.9998917...
View ArticleHow do I change the structure of a r data table
I've merged a handful of data sets all downloaded from either spss, cvs, or excel files into one large data table. For the most part I can use all the variables I want to run tests but every once in a...
View ArticleConvex union operation in R
I have 3 vectors a = c(3,7) b = c(4,6) c = c(2,6) I would like to make the union of these 3 sets. I could use the union() function but "convex" union requires that the vector c is removed from the...
View ArticleAddition of exponential regression models to scatterplot
I have data set consisting of 7 species wet weights and size measurements. Number of observations range between 3 and 18 per species.Species ID Wet weight(g) Size(mm)These measurements are visualised...
View ArticleConversion of Millions to Billions using R without splitting the column?...
$1.2 B $2.3 B $3 B $3.5 B $1.3 B $808 M $3.8 B $3.8 B $135 M $2.8 B $3.3 B $3.3 B $4.6 B $196 M $79 M $3 B $1.8 B $2.4 B $2.5 B $3.3 B $2.7 B $9.2 B $439 M $2.3 B $900 M $2.8 B $784 M $2.3 B $884 M...
View Articlels("package:datasets") in R
Well I can see that ls("package:datasets")prints the names of some data frames but don't understand the single colon and why is the expression in quotes? Can someone explain this expression? Thanks
View ArticleHow to calculate enthalpy by using mutate for each column in R?
I would like to calculate enthalpy by using steam table function . I want to adapt the function to a Tibble table which include temp and pressure, but failed. For example, I want to add the enthalpy...
View ArticleError installing packages in RStudio: error reading from connection
I have recently updated both R (version 3.4.1) and RStudio (version 1.0.143) and I am now unable to install packages from Rstudio.If I install a package in R directly using install.packages() it works...
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Why will RStudio only render some data frames?
Usually, typing the name of a dataframe and pressing Ctrl-Enter will render a table. For some dataframes the dataframe won't appear until you knit it (or use the view() function). Why is this?Below is...
View ArticleExtracting data from a list of vector in the while loop in r [closed]
I post my follow up question about my previous one. From this code, I want a list of vector to be created containing data with this format: l3 [[1]] [1] v1 v2 v3 v4[[2]] [1] w1 w2 w3 w4[[3]] [1] z1 z2...
View ArticleR on Windows - compile errors - \U used without Hex digits
hoping someone can help me.I have R 3.2.2 (2015-08-14) and RStudio 0.99.489 on Windows 7. my default working directory is c:\users\adamsben\, but could be anywhere.I know that when I load a file, such...
View ArticleParameter Estimation
I have data sets and the sinusoidal model y=fc+fe sin(2π(x-t0)/12) in which fc, fe and t0 are the parameters . I have to calculate the parameter estimation of fc and fe (keep t0 constant). Is there any...
View ArticleLearning Functional Programming in R
I am a beginner in R. I have recently realized that I can reduce my code more leanly / elegantly by using Functional Programming.As an Economist I am a little lost in how and where to start studying...
View ArticleHow to bring specific values from another data frame? in R
I am working with two dataframes. One is a raw data that recorded the respondent's response from the survey (they had to choose one choicest among three) so it indicates from 1-3. The second data frame...
View ArticleCreating two new columns and removing the source column
I have the following example data: df <- data.frame(ID=c("A1","A2","A3","A4","A1","A2","A3","A4"), NUM=c(469,586,394,595,398,203,604,809)) I am looking to extract the first value of the NUM column...
View ArticleRemove rows contains certain value from spatial dataframe - solved
I want to remove the rows that have certain values from the spatial data.frame since the standard R grep() seems not propagate through all slots of an sp class object. bd@data[- grep("xcluded",...
View ArticleR; Making the rate table for relative survival analysis
The package "relsurv" can calculate relative survival. Input are your data (in my case patients diagnosed with colorectal cancer) and then the rate table which includes the change of surviving to the...
View ArticleLeaflet map not pulling reactive data
Second time using leaflet and a little confused between the interaction of reactive filter data and observe. I have checkbox and selectInput options which filter parts of database to produce a map with...
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