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274a20f162e271e8246667efe0c200af
mooc-rr
Commits
ae5185d4
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ae5185d4
authored
Feb 24, 2021
by
274a20f162e271e8246667efe0c200af
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J'ai appris à écrire pi
parent
9f821b15
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toy_document_fr.Rmd
module2/exo1/toy_document_fr.Rmd
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module2/exo1/toy_document_fr.Rmd
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ae5185d4
...
@@ -10,7 +10,7 @@ knitr::opts_chunk$set(echo = TRUE)
...
@@ -10,7 +10,7 @@ knitr::opts_chunk$set(echo = TRUE)
```
```
# En demandant à la lib maths
# En demandant à la lib maths
Mon ordinateur m'indique que *
π
* vaut *approximativement*
Mon ordinateur m'indique que *
$\pi$
* vaut *approximativement*
```{r}
```{r}
pi
pi
```
```
...
@@ -35,7 +35,7 @@ df$Accept = (df$X**2 + df$Y**2 <=1)
...
@@ -35,7 +35,7 @@ df$Accept = (df$X**2 + df$Y**2 <=1)
library(ggplot2)
library(ggplot2)
ggplot(df, aes(x=X,y=Y,color=Accept)) + geom_point(alpha=.2) + coord_fixed() + theme_bw()
ggplot(df, aes(x=X,y=Y,color=Accept)) + geom_point(alpha=.2) + coord_fixed() + theme_bw()
```
```
Il est alors aisé d'obtenir une approximation (pas terrible) de *
π
* en comptant combien de fois, en moyenne *X*2+*Y*2 est inférieur à 1 :
Il est alors aisé d'obtenir une approximation (pas terrible) de *
$\pi$
* en comptant combien de fois, en moyenne *X*2+*Y*2 est inférieur à 1 :
```{R}
```{R}
4*mean(df$Accept)
4*mean(df$Accept)
```
```
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