When using R, we may need find our data has been saved in a different statistics package. While there are some export functions in other statistical software that will export to a different filetype, or we may simply use a .csv file, R can import some ... [Read more...]

When dealing with survey data in particular, social scientists are often wanting to produce proportions from the data, and associated confidence intervals. The prop.test command in R can be used to generate the desired results. When dealing with small ... [Read more...]

If you're anything like me, you use words to name both data frames and variables. I use metadata documentation to keep track of new variables I have constructed, and the logic I have used to construct them (and why I bothered!) but I find many variable... [Read more...]

ifelse statements in R are the bread and butter of recoding variables. Normally these are pretty easy to do, particularly when we are recoding off one variable, and that variable contains no missing values. There are lots of examples on how to do this ... [Read more...]

I've been tied up with other work, so things have been a bit slow on the mixed methods development. I hope to do another post on the analysis in about a week, but today I would like to do an introduction to ggplot2 and demonstrate some of its... [Read more...]

To recap:we've cleaned the data (see earlier posts)we're up to constructing the output data that will be used to estimate the population distribution values for the particular nutrient we are examining (energy)The code below is my implementation of the... [Read more...]

I run plain R in the normal gui under Windows 7, which means no bells and whistles. This means that I find the R gui somewhat awkward to program in. Thanks to advice I received a number of years ago, I use Notepad ++ as my programming environment. It h... [Read more...]

With any relatively complicated programming task, I prefer to first create a story board that provides the steps I will take to complete the overall task. This may end up being a heavily edited post if I find that my plans change part way through.The p... [Read more...]

Data on daily nutrient intake information is stored within a database, and the users are extracting the relevant data on a nutrient-by-nutrient basis through an export procedure. The exported data is being stored in Excel 2010 data sets, one for each n... [Read more...]