JP Monteagudo

::::: {#visualization-pearsons-correlation-coefficient .section .level2}
## Visualization & Pearson's correlation coefficient {.anchored anchor-id="visualization-pearsons-correlation-coefficient"}

The
[`30DayChartChallenge`](https://nightingaledvs.com/the-30daychartchallenge-year-three/)
is a data visualization community that hosts daily challenges for April.
Today's challenge involves dinosaurs. I used the `Datasaurus` package to
create an animated visualization to demonstrate the importance of
graphing data, and the effects of outliers on statistical properties. In
these datasets, the mean and the standard deviation of
![](https://latex.codecogs.com/png.latex?x) and
![](https://latex.codecogs.com/png.latex?y) remain almost the same, but
the distribution of observation pairs goes through obvious drastic
changes.

:::: {.cell messages="false"}
Code

::: {#cb1 .sourceCode .cell-code style="background: #f1f3f5;"}
``` {.sourceCode .numberSource .r .number-lines .code-with-copy}
## -------------------------------------- ##
## Day 19: Dinosaurs; 30DayChartChallenge ##
## -------------------------------------- ##
## Loading libs                           ##
library(datasauRus)                       ##
library(tidyverse)                        ##
library(gganimate)                        ##                                                    
library(showtext)                         ##
## -------------------------------------- ##

# Setting custom theme for ggplot2 graphics

clrs <- c( # Creating custom color palette
  "#e5b858", #  yellow
  "#B72025", #  red
  "#7C225C", #  purple
  "#d3d6d9", #  dark gray
  "#f9f9f9", #  light gray
  "#394DAA") #  blue

# Import Fonts (google name, R name)
font_add_google("Source Code Pro","source_code")
font_add_google("Montserrat","mont")
showtext_auto() # enable showtext font rendering

theme_blue <- function() {
  theme_minimal(base_family = "mont") +
  theme(
    plot.title = element_text(family = "mont", face = "bold", size = rel(1.35)),
    plot.subtitle = element_text(family = "mont", colour = "royalblue", face = "plain", size = rel(1)),
    plot.background = element_rect(fill = clrs[5], colour = clrs[5]),
    panel.border = element_blank(),
    panel.background = element_rect(fill = clrs[5]),
    panel.grid.major.x = element_line(colour = clrs[6], linetype = 3, linewidth = .35),
    panel.grid.minor.x = element_blank(),
    panel.grid.major.y =  element_line(colour = clrs[6], linetype = 3, linewidth = .35),
    panel.grid.minor.y = element_blank(),
    # modify text, axis and colour 4) and 5)
    axis.text = element_text(colour = clrs[6], face = "plain", family = "mont"),
    axis.title = element_text(colour = clrs[6], family = "mont"),
    axis.ticks = element_line(colour = clrs[6]),
    # legend at the bottom 6)
    legend.position = "none"
  )
}

theme_set(theme_blue())

ggplot2::update_geom_defaults("label", list(family = "mont", fontface = "bold"))
ggplot2::update_geom_defaults("text", list(family = "mont", fontface = "plain"))


# Checking min/max for axis transform
datasaurus <- datasaurus_dozen
summary(datasaurus)

dino <- ggplot(datasaurus, aes(x = x, y = y))+
  geom_point(size = 3, alpha = .65, 
             colour = clrs[3]) +
  labs(x = NULL,y = NULL,
       title = "Day 19 of 30 Day Chart Challenge",
       subtitle = "The T-rex",
       caption = "Always check your data graphically") +
  theme_blue() +
  transition_states(states = dataset,
                    transition_length = 2,
                    state_length = 1,
                    wrap = TRUE) +
  ease_aes("linear")

animate(dino, duration = 15, fps = 24, height = 680, width = 720,
        renderer = gifski_renderer())

anim_save(filename = "dino.gif",
          path = here::here("blog","2024","04","dinosaurs","img"))
```
:::
::::
:::::

::: {#the-animated-data .section .level2}
## The Animated Data {.anchored anchor-id="the-animated-data"}

![Datasaurus Day 19 Chart Challenge
2024](https://www.jpmonteagudo.com/blog/2024/04/dinosaurs/img/dino.gif)
:::

:::::: {#measures-of-central-tendency .section .level2}
## Measures of Central Tendency {.anchored anchor-id="measures-of-central-tendency"}

::::: {.cell .tbl-cap-location-top tbl-colwidths="[50,50]"}
Code

::: {#cb2 .sourceCode .cell-code cap-location="top" style="background: #f1f3f5;"}
``` {.sourceCode .numberSource .r .number-lines .code-with-copy}
library(datasauRus) 
library(knitr)
library(tidyverse)

datasaurus <- datasaurus_dozen
group_datasaurus <- datasaurus %>%
  group_by(dataset) %>% 
  summarize(avg_x = round(mean(x),2), 
            stdev_x = round(sd(x),2), 
            avg_y = round(mean(y),2), 
            stdev_y = round(sd(y),2))
knitr::kable(group_datasaurus,
             col.names = c('Data', 'Mean(x)','SD(x)','Mean(y)','SD(y)'))
```
:::

::: {.cell-output-display}
| Data       | Mean(x) | SD(x) | Mean(y) | SD(y) |
|:-----------|--------:|------:|--------:|------:|
| away       |   54.27 | 16.77 |   47.83 | 26.94 |
| bullseye   |   54.27 | 16.77 |   47.83 | 26.94 |
| circle     |   54.27 | 16.76 |   47.84 | 26.93 |
| dino       |   54.26 | 16.77 |   47.83 | 26.94 |
| dots       |   54.26 | 16.77 |   47.84 | 26.93 |
| h_lines    |   54.26 | 16.77 |   47.83 | 26.94 |
| high_lines |   54.27 | 16.77 |   47.84 | 26.94 |
| slant_down |   54.27 | 16.77 |   47.84 | 26.94 |
| slant_up   |   54.27 | 16.77 |   47.83 | 26.94 |
| star       |   54.27 | 16.77 |   47.84 | 26.93 |
| v_lines    |   54.27 | 16.77 |   47.84 | 26.94 |
| wide_lines |   54.27 | 16.77 |   47.83 | 26.94 |
| x_shape    |   54.26 | 16.77 |   47.84 | 26.93 |

Mean & Standard Deviation of *x* and *y*
:::
:::::
::::::

::::::: {#quarto-appendix}
:::::: {#quarto-citation .section .quarto-appendix-contents}
## Citation {#citation .anchored .quarto-appendix-heading}

<div>

::: {.quarto-appendix-secondary-label}
For attribution, please cite this work as:
:::

::: {#ref-monteagudo2024 .csl-entry .quarto-appendix-citeas}
Monteagudo, JP. 2024. "Animating the Datasaurus Dataset as Part of the
\*30 Day Chart Challenge\*." April 19, 2024.
<https://doi.org/10.59350/wx5k1-ajc38>.
:::

</div>
::::::
:::::::


Visualization &amp; Pearson’s correlation coefficient   The 30DayChartChallenge is a data visualization community that hosts daily challenges for April. Today’s challenge involves dinosaurs. I used the Datasaurus package to create an animated visualization to demonstrate the importance of graphing data, and the effects of outliers on statistical properties.

Messaggi di Rogue Scholar

Animating the Datasaurus dataset as part of the 30 Day Chart Challenge