|
|
@ -15,21 +15,29 @@ These things may feel weird at first, but, R's type system is one of the things |
|
|
 |
|
|
 |
|
|
|
|
|
|
|
|
Did I mention that arrays start at 1? |
|
|
Did I mention that arrays start at 1? |
|
|
Technically, the thing which we refer to as an array in C or Java is really a vector in R. |
|
|
|
|
|
|
|
|
Technically, the thing which we refer to as an array in Java are really vectors in R. |
|
|
Arrays in R are data objects which can store data in more than two dimensions. |
|
|
Arrays in R are data objects which can store data in more than two dimensions. |
|
|
Since R tries to follow mathematical notation, indexing starts at 1 -- just like in linear algebra. |
|
|
Since R tries to follow mathematical notation, indexing starts at 1 -- just like in linear algebra. |
|
|
Using zero based indexing makes sense for languages like C because the index is used to get at a particular memory location from a pointer. |
|
|
Using zero based indexing makes sense for languages like C because the index is used to get at a particular memory location from a pointer. |
|
|
|
|
|
|
|
|
<youtube src="s3FozVfd7q4" /> |
|
|
<youtube src="s3FozVfd7q4" /> |
|
|
|
|
|
|
|
|
I don't have the time to go over the basic syntax of R in a single blog post, however, I feel that this youtube video does a pretty good job. |
|
|
|
|
|
|
|
|
I don't have the time to go over the basic syntax of R in a single blog post; however, I feel that this youtube video does a pretty good job. |
|
|
|
|
|
|
|
|
# R Markdown |
|
|
# R Markdown |
|
|
|
|
|
|
|
|
|
|
|
One of my favorite aspects of R is its markdown language called Rmd. |
|
|
|
|
|
Rmd is essentially markdown which has can have embedded R scripts run in it. |
|
|
|
|
|
The Rmd file is compiled down to a markdown file which is converted to either a PDF, HTML file, or a slide show using pandoc. |
|
|
|
|
|
You can provide options for the pandoc render using a YAMAL header in the Rmd file. |
|
|
|
|
|
This is an amazing tool for creating reports and writing research papers. |
|
|
|
|
|
The documents which you create are reproducible since you can share the source code to it. |
|
|
|
|
|
If the data which you are using changes, you simply have to recompile to document to get an updated view. |
|
|
|
|
|
You no longer have to re-generate a dozen graphs and update figures and statistics across your document. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
# Resources |
|
|
# Resources |
|
|
|
|
|
|
|
|
- [R for Data Science(Online Book)](https://r4ds.had.co.nz/) |
|
|
|
|
|
|
|
|
- [R for Data Science (Online Book)](https://r4ds.had.co.nz/) |
|
|
- [R Studio](https://www.rstudio.com/) |
|
|
- [R Studio](https://www.rstudio.com/) |
|
|
- [R Official Website](https://www.r-project.org/) |
|
|
- [R Official Website](https://www.r-project.org/) |
jrtechs
6 years ago