Publications by Duong Tran
Daily Stock Prices Plots with ggplot2
Introduction These plots were created from ggplot2 and the purpose of this is to identify possible trends among stock prices. That is - does a particular group of stocks tend move in tandem; why some stocks surge at a particular point; does their prices affected by economic and political crisis etc. By studying these historical prices data one ma...
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Clinical Reporting R Packages
Introduction There are now a number of R packages that are specifically for Clinical Reporting. The following plots show their daily downloads - an indication of their popularity. I’ve also included two of the most popular packages - dplyr and ggplot2 for some perspective of the R’s community. Set 1 Set 2 ...
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Colour Palettes
I generated, and am sharing some colour palettes that I like. Colours are an important factor in visualisation; a ‘better’ scheme can draw more attraction to yours works. Set 1 ...
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Calling R from Windows SAS
Introduction There are two methods for calling R from SAS; in batch mode as describe in (Holland, Wei) and via the PROC IML interface provides by SAS. This tutorial will only go through the setting up for the second method, follows by some usage examples. Requirements Check that SAS and R are installed on the same machine (server), then run (PRO...
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Clinincal Graphs with ggplot2
Introduction Hi I am Duong, a SAS programmer with many years of experience in the Pharmaceutical industry and I have been teaching myself R in the past year. I have produced some graphs with the ggplot2 package and now would like to share them with my thoughts and experiences. If you are about to set off a similar journey, these results and thoug...
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Reading Raw Data
The first task before any data analysis can begin is of course importing the data into the software application that you are using. And this often means reading the data from a comma-separated values (CSV) file. This tutorial gives a brief introduction on how R imports a CSV file. There is more than one package that can do this, but here we shall...
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Mixing SAS and R Plots
Introduction Multiple plots on a graph is often desired; in lattice, panel or sometime as inset layouts. SAS and R, both have functionalities for these display, but have you ever thought of combining SAS and R plots? Not by cut and paste but programmatically. This is absolutely possible and I shall go over such a technique with some examples in t...
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A SAS RTF Parser Macro with the Aid of an R Package
Introduction Extracting data from a Rich Text Format (RTF) table is a common need. For example, in clinical trial reporting, this desire of extracting RTF tables and converts them into SAS datasets are mainly for two reasons. One, to validate tables and listings (TLs) programmatically; secondly, to compare different versions of (TLs). There are p...
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flextable
Introduction flextable is a fantastic package for tabulating static tables. The outputs can be saved as (html, docx, ptx, png) formats and its grammar is similar to that of ggplot2, where each additional aspect to a table is build-up of statements separate by the pipe symbol “%>%”. The API is very well designed with rich functionalities. You ...
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