Intro webR Quiz

Exercise 1

Calculate the mean of these numbers

Exercise

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9

1

2

›

______(1:10)

_webr_editor_3 = Object {code: null, options: Object, indicator: Ke}

mean(1:10)

mean(1:10)

Exercise 2

Replace with the text area_name

Sample Exercise

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9

1

›

select(linelist, ____)

_webr_editor_8 = Object {code: null, options: Object, indicator: Ke}

select(linelist, area_name)

select(linelist, area_name)

Exercise 3

Replace with the select function to select the column area_name.

Exercise

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9

1

›

_____(linelist, area_name)

_webr_editor_13 = Object {code: null, options: Object, indicator: Ke}

select(linelist, area_name)

select(linelist, area_name)

Run any code

R Code

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9

1

›

_webr_editor_18 = Object {code: "", options: Object, indicator: Ke}

ojs

foo = 123;

foo = 123

bar

RuntimeError: bar is not defined

OJS Runtime Error (line 122, column 1)

bar is not defined

When you change this it affects things above it!

R Code

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9

1

›

bar <- foo * 2

_webr_editor_19 = Object {code: null, options: Object, indicator: Ke}

We can also do interactive stuff!

viewof colour = Inputs.select(
  [ 'orangered', 'forestgreen', 'cornflowerblue' ],
  { label: 'Colour' }
);
draw_hist(colour);

Colour orangeredforestgreencornflowerblue

colour = "orangered"

RuntimeError: draw_hist is not defined

OJS Runtime Error (line 150, column 1)

draw_hist is not defined

naquiz Example

Bill Gates was the founder of:

✗Apple

✓Microsoft

✗Facebook

✗Google

Downloading webR