POST CLASS UPDATE: Data Import and Basic R

modules/Basic_R/Basic_R.Rmd

@@ -337,23 +337,10 @@ str(y)
 
 This tells you that `x` is a numeric vector and tells you the length.
 
-## R objects
-
-This is handy when we start dealing with bigger / more complex objects.
-
-```{r include=FALSE}
-z <- sample(y, size = 100, replace = T)
-```
-
-```{r}
-str(z)
-```
-
 ## Lab Part 2
 
 - Reassigning allows you to make changes "in place"
 - `str()` tells you a lot of information about an object in your environment
-- `sample()` creates a random sample of values
 
 💻 [Lab](https://jhudatascience.org/intro_to_r/modules/Basic_R/lab/Basic_R_Lab.Rmd)
 

modules/Basic_R/lab/Basic_R_Lab.Rmd

@@ -16,7 +16,9 @@ Remember anything you type here can be "sent" to the console with Cmd-Enter (OS-
 
 # Part 1
 
-1\. Create a new object called `my.num` that contains 6 numbers.
+### 1.1 
+
+Create a new object called `my.num` that contains 6 numbers.
 
 ```
 # General format
@@ -27,15 +29,17 @@ my.num <- c(number1, number2, ...)
 
 ```
 
+### 1.2
 
-2\. Multiply `my.num` by 4.
+Multiply `my.num` by 4.
 
 ```{r}
 
 ```
 
+### 1.3
 
-3\. Create a second object called `my.char` that contains 5 character strings.
+Create a second object called `my.char` that contains 5 character strings.
 
 ```
 # General format
@@ -46,29 +50,36 @@ my.char <- c("character1", "character2", ...)
 
 ```
 
+### 1.4
 
-4\. Combine the two objects `my.num` and `my.char` into an object called `both`.
+Combine the two objects `my.num` and `my.char` into an object called `both`.
 
 ```{r}
 
 ```
 
+### 1.5
 
-5\. What is the length of `both`? Use the `length()` function.
+What is the length of `both`? Use the `length()` function.
 
 ```{r}
 
 ```
 
+### 1.6 
 
-6\. What class is `both`?
+What class is `both`?
 
 ```{r}
 
 ```
 
 
-**Bonus / Extra practice**: Create a vector that contains 4 sets of the numbers 1, 2, 3, and 4.
+# Practice on Your Own!
+
+### P.1
+
+Create a vector that contains 4 sets of the numbers 1, 2, 3, and 4.
 
 ```{r}
 
@@ -77,26 +88,30 @@ my.char <- c("character1", "character2", ...)
 
 # Part 2
 
-7\. Divide `both` by 3, what happens?
+### 2.1
+
+Divide `both` by 3, what happens?
 
 ```{r, error=TRUE}
 
 ```
 
+### 2.2
 
-8\. Create a vector with elements 1, 2, 3, 4, 5 and call it `x`.
+Create a vector with elements 1, 2, 3, 4, 5 and call it `x`.
 
 ```
 # General format
 x <- c(...)
 ```
-
+ 
 ```{r}
 
 ```
 
+### 2.3
 
-9\. Create another vector with elements 10, 20, 30, 40, 50 and call it `y`.
+Create another vector with elements 10, 20, 30, 40, 50 and call it `y`.
 
 ```
 # General format
@@ -107,15 +122,17 @@ y <- c(...)
 
 ```
 
+### 2.4
 
-10\. Determine the length of `x` and `y`. Next, add them together.
+Determine the length of `x` and `y`. Next, add the vectors x and y together.
 
 ```{r}
 
 ```
 
+### 2.5
 
-11\. Append the value 60 onto the vector `y` (hint: you can use the `c()` function).
+Append the value 60 onto the vector `y` (hint: you can use the `c()` function).
 
 ```
 # General format
@@ -126,32 +143,41 @@ y <- c(y, ...)
 
 ```
 
+### 2.6
 
-12\. Determine the length of `x` and `y`.
+Determine the length of `x` and `y`.
 
 ```{r}
 
 ```
 
+### 2.7
 
-13\. Add `x` and `y` together. What happens?
+Add `x` and `y` together. What happens?
 
 ```{r}
 
 ```
 
 
-**Bonus / Extra practice**: Multiply the following `a` and `b` together. How is this similar to the way R performs addition in #10 ?
+# Practice on Your Own!
+
+### P.2
+
+Multiply the following `a` and `b` together. How is this similar to the way R performs addition in #10 ?
 
 ```{r}
 a <- c(1, 2, 3)
 b <- c(10, 100, 1000)
+
 ```
 
 
 # Part 3
 
-14\. Create a vector object called `int_vect` that starts at 1 and goes up to 10. Use `seq()`.
+### 3.1
+
+Create a vector object called `int_vect` that starts at 1 and goes up to 10. Use `seq()`.
 
 ```
 # General format
@@ -162,8 +188,9 @@ seq(from = NUMBER, to = NUMBER)
 
 ```
 
+### 3.2
 
-15\. Repeat the `int_vect` object this sequence 3 times using `rep()` and store the new object as `int_vect_3`.
+Repeat the `int_vect` object this sequence 3 times using `rep()` and store the new object as `int_vect_3`.
 
 ```
 # General format - times and each are optional
@@ -174,29 +201,36 @@ rep(x = OBJECT_TO_REPEAT, times = NUM_TIMES_TO_REPEAT, each = NUM_TIMES_TO_REPEA
 
 ```
 
+### 3.3
 
-16\. What is the length of `int_vect_3`?
+What is the length of `int_vect_3`?
 
 ```{r}
 
 ```
 
+### 3.4
 
-17\. Create a vector that takes the sequence "Strongly Agree", "Agree", "Neutral", "Disagree", "Strongly Disagree" and repeats each element 10 times.
+Create a vector that takes the sequence "Strongly Agree", "Agree", "Neutral", "Disagree", "Strongly Disagree" and repeats each element 10 times.
 
 ```{r}
 
 ```
 
 
-**Bonus / Extra practice**: "Strongly Agree", "Agree", "Neutral", "Disagree", "Strongly Disagree" are often responses to surveys. Create a randomly sampled vector of 30 survey responses. (hint use `sample()` and set the replace argument to `TRUE`). Store the output as `my_responses`. Examine the data by typing the name `my_responses` in the Console.
+# Practice on Your Own!
+
+### P.3
+
+"Strongly Agree", "Agree", "Neutral", "Disagree", "Strongly Disagree" are often responses to surveys. Create a randomly sampled vector of 30 survey responses. (hint use `sample()` and set the replace argument to `TRUE`). Store the output as `my_responses`. Examine the data by typing the name `my_responses` in the Console.
 
 ```{r}
 
 ```
 
+### P.4
 
-**Bonus / Extra practice**: Let's say you change your survey so participants can rank their response 1-10 (inclusive). Create a randomly sampled vector of 30 survey responses. (hint use `seq()` and `sample()` and set the replace argument to `TRUE`). Store the output as `my_responses_2`. Examine the data by typing the name `my_responses_2` in the Console.
+Let's say you change your survey so participants can rank their response 1-10 (inclusive). Create a randomly sampled vector of 30 survey responses. (hint use `seq()` and `sample()` and set the replace argument to `TRUE`). Store the output as `my_responses_2`. Examine the data by typing the name `my_responses_2` in the Console.
 
 ```{r}