comparison analysis/analyse_gtzan.Rmd @ 0:205974c9568c tip

Initial commit. Predictions not included for lack of space.

+---
+title: "Analyse GTZAN"
+output: html_notebook
+---
+
+```{r}
+source('../db/access_db.R')
+library(tidyverse)
+```
+
+
+
+
+```{r}
+excerpts_classes <- get_excerpts_classes()
+
+excerpts_artist <- get_excerpts_artists()
+
+classes_artists <- excerpts_classes %>%
+  inner_join(excerpts_artist, by = c('ex_id')) %>%
+  inner_join(get_class_names(), by = c('class_id'))
+
+```
+
+## Number of artists per class
+
+```{r}
+(table_class_artists <- 
+  classes_artists %>%
+  group_by(class) %>%
+  summarise(Unique_Artists = n_distinct(artist_id)))
+```
+
+```{r fig.height=2.5, fig.width=6}
+ggplot(table_class_artists, aes(class, Unique_Artists)) + 
+  geom_bar(stat = 'identity') +
+  scale_x_discrete(name = 'GTZAN Class') + 
+  scale_y_continuous(name = 'Unique Artists',
+                     breaks = c(0, 25, 50, 75),
+                     limits = c(0, 75)) +
+  theme_bw() +
+  theme(axis.title = element_text(size = 24),
+        axis.title.x = element_text(vjust = -4),
+        axis.text = element_text(size = 22),
+        axis.text.x = element_text(angle = 45, vjust = 0.5))
+
+
+```
+
+## Number of recordings per artist
+
+
+```{r}
+(table_excerpts_artists <- 
+  classes_artists %>%
+  group_by(class, artist_id) %>%
+  summarise(rec = n_distinct(ex_id)))
+```
+
+```{r fig.height=2.5, fig.width=6}
+ggplot(table_excerpts_artists, aes(class, Unique_Artists)) + 
+  geom_boxplot(aes(x = class, y = rec)) +
+  scale_x_discrete(name = 'GTZAN Class') + 
+  scale_y_continuous(name = 'Excerpts per Artist',
+                     limits=c(0,40)) +
+  theme_bw() +
+  theme(axis.title = element_text(size = 24),
+        axis.title.x = element_text(vjust = -4),
+        axis.text = element_text(size = 22),
+        axis.text.x = element_text(angle = 45, vjust = 0.5))
+
+```