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Update 08-matricesdataframes.Rmd #23

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2 changes: 1 addition & 1 deletion 08-matricesdataframes.Rmd
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Expand Up @@ -612,7 +612,7 @@ As you can see, we have to retype the name of the dataframe for each column. How

```{r}
# Save typing by using with()
with(health, height / weight ^ 2)
with(health, weight / height ^ 2)
```

As you can see, the results are identical. In this case, we didn't save so much typing. But if you are doing many calculations, then `with()` can save you a lot of typing. For example, contrast these two lines of code that perform identical calculations:
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