Date example

[lf-araujo]

Hi Vindaar,

First thank you for this excellent module.

For future reference, this is a common example of use of Date types in R that should improve the plotting ggplotnim capabilities. I believe this is perhaps more suited to be managed in a separate data management module.

So, for the data set:

https://gist.github.com/lf-araujo/5da7266c44b3824b824d578411dee73c

Where dates are arbitrarily entered, but one would usually want to print this out standardised as year, typical R code would use as.Date() and look like the following:

read.csv("finances.csv") %>% 
    ggplot(aes( x = as.Date(date), y = yrate)) +
         geom_line()+
         geom_point()

Resulting in:

However, current ggplotnim code would look like:

proc plot() = 
  let df = toDf(readCsv("./finances.csv"))
  ggplot(df, aes(x = "date")) + 
    geom_line(aes( y = "yrate")) + 
    ylab("Rate") +
    xlab(rotate = -45.0, margin = 1.75, alignTo = "right") +
    ggtitle("Rate evolution") +
    ggsave("finances.png")

and finances.png looks rather confusing:

It is not handling negative values correctly and the dates are not standardised by year. This is currently not possible and not supported. This example is just for future testing.

[Vindaar]

Closing as duplicate.