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Update visualize.Rmd (#863) 

Solid shapes are 15-20, not 15-18.
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juandering 2020-10-03 17:36:08 +03:00 committed by GitHub
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@ -175,7 +175,7 @@ Here, the color doesn't convey information about a variable, but only changes th
* The shape of a point as a number, as shown in Figure \@ref(fig:shapes).
```{r shapes, echo = FALSE, out.width = "75%", fig.asp = 1/3, fig.cap="R has 25 built in shapes that are identified by numbers. There are some seeming duplicates: for example, 0, 15, and 22 are all squares. The difference comes from the interaction of the `colour` and `fill` aesthetics. The hollow shapes (0--14) have a border determined by `colour`; the solid shapes (15--18) are filled with `colour`; the filled shapes (21--24) have a border of `colour` and are filled with `fill`.", warning = FALSE}
```{r shapes, echo = FALSE, out.width = "75%", fig.asp = 1/3, fig.cap="R has 25 built in shapes that are identified by numbers. There are some seeming duplicates: for example, 0, 15, and 22 are all squares. The difference comes from the interaction of the `colour` and `fill` aesthetics. The hollow shapes (0--14) have a border determined by `colour`; the solid shapes (15--20) are filled with `colour`; the filled shapes (21--24) have a border of `colour` and are filled with `fill`.", warning = FALSE}
shapes <- tibble(
shape = c(0, 1, 2, 5, 3, 4, 6:19, 22, 21, 24, 23, 20),
x = (0:24 %/% 5) / 2,