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Juan Luis
Asked: 2020-04-11 03:44:38 +0800 CST 2020-04-11 03:44:38 +0800 CST

How to make each piece of code in r markdown execute correctly without having to call my dataframe on each piece?

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I am making a presentation in R markdown and I would like that when executing each code fragment I do not have to call the dataframe that I use in each fragment. I explain:

First, in my R markdown document I call my dataframe

```{r, include =FALSE}
library(readxl)
datos_def<- read_excel("datos_def_excel")
summary(datos_def)

Now, I write an introduction and add another code snippet:

```{r, eval=TRUE,echo=FALSE}
options(digits=3,scipen=999)
summary(datos_def$edad)

When I go to generate the pdf document (I click on Knit) it will do so without any problem. But when I hit the green play prompt to run each chunk separately , it returns the following error:

Error in summary(data_def$age) : object 'data_def' not found

What do I need to do to be able to execute each code snippet without having to call the dataframe in each snippet datos_def?

r

1 Answers

  1. Best Answer

    In the generation by means of knitra totally new R session is instantiated and independent of the one you are using, where obviously, the is processed Rmdsequentially, and then yes, it datos_defexists because in the first place the reading from the file was already evaluated Excel.

    In your interactive session where you run each chunk separately, you should respect this same order, i.e. run first, reading from the file, then the object datos_defwill be instantiated in the current environment, and the next chunk that does reference to that object should not give you an error.

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