Questions[r]

In general we are used to seeing that collection type objects, I am talking about lists, arrays, matrices, recordsets, or whatever they are called in any language, are "indexed" starting at position 0. However, in R, for some decision By design, any objects (in fact Rthere are no scalar objects) are "indexed" starting at 1.

> vector <- c(1,2,3)
> vector[1]
[1] 1
> vector[0]
numeric(0)

Historically speaking, what motivated this decision? Does it have any particular advantage over "indexing" starting at 0?

I would like to build a function like the following:

function(x, y, operador) 

The idea is that it receives an operator, for example: +, -, *. /and can return the result of applying the same between xey

When loading a package there are two ways to do it: library()and require(). What differences, if any, are there between the two methods?

Free translation and reworking of: What is the difference between require() and library()?

Whether it is when asking a question on this site or when we need to share an example with a colleague, what elements should we take into account to ensure the reproducibility of the example? (information, data, structures, etc.)

R's graph generation system ggplot2is surprisingly versatile, but I haven't found a way to generate a waterfall chart similar to this:

How can I, using ggplot2, generate this kind of chart?

Sample data (similar to the graph shown:

df <- data.frame(
  montos = c(420, 210, -170, -140),
  row.names = c('Ingresos', 'Otros ingresos', 'Costos fijos', 'Costos variables')
)
df
##                  montos
## Ingresos            420
## Otros ingresos      210
## Costos fijos       -170
## Costos variables   -140