inst/shiny-exams/examsapp/global.R
In flaviobarros/shinyExams: Creates exams from a shiny app
## global setup file ##
############# Support Functions ###############################
get_template_code <- function(type, markup)
{
if(markup == "LaTeX") {
excode <- switch(type,
"schoice" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'cities <- c("Munich", "Innsbruck", "Zurich", "Amsterdam")',
'countries <- c("Germany", "Austria", "Switzerland", "Netherlands")',
'question <- sample(cities, size = 1)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{question} will return the name of the sampled city in the code above.',
'In which country is Munich?',
'\\begin{answerlist}',
' \\item Austria',
' \\item Germany',
' \\item Switzerland',
' \\item Netherlands',
'\\end{answerlist}',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!',
'Munich is in Germany.',
'\\begin{answerlist}',
' \\item False.',
' \\item True.',
' \\item False.',
' \\item False.',
'\\end{answerlist}',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{schoice}',
'%% \\exsolution{0100}',
'%% \\exname{Mean}',
'%% \\exshuffle{Cities}'),
"num" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'x <- c(-0.17, 0.63, 0.96, 0.97, -0.77)',
'Mean <- mean(x)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{Mean} will return the mean of variable x in the R code above.',
'Calculate the mean of the following numbers: \\\\',
'$',
'-0.17, 0.63, 0.96, 0.97, -0.77.',
'$',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!',
'The mean is $0.324$.',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{num}',
'%% \\exsolution{0.324}',
'%% \\exname{Mean}',
'%% \\extol{0.01}'),
"mchoice" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'x <- c(33, 3, 33, 333)',
'y <- c(3, 3, 1/6, 1/33.3)',
'solutions <- x * y',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{solutions[1]} will return the solution of the first statement.',
'Which of the following statements is correct?',
'\\begin{answerlist}',
' \\item $33 \\cdot 3 = 109$',
' \\item $3 \\cdot 3 = 9$',
' \\item $33 / 6 = 5.5$',
' \\item $333 / 33.3 = 9$',
'\\end{answerlist}',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!', '',
'\\begin{answerlist}',
' \\item False. Correct answer is $33 \\cdot 3 = 99$.',
' \\item True.',
' \\item True.',
' \\item False. Correct answer is $333 / 33.3 = 10$.',
'\\end{answerlist}',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{mchoice}',
'%% \\exsolution{0110}',
'%% \\exname{Simple math}',
'%% \\exshuffle{TRUE}'),
"string" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'cities <- c("Munich", "Innsbruck", "Zurich", "Amsterdam")',
'countries <- c("Germany", "Austria", "Switzerland", "Netherlands")',
'question <- sample(cities, size = 1)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{question} will return the name of the sampled city in the code above.',
'In which country is Munich?',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!',
'Munich is in Germany.',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{string}',
'%% \\exsolution{Germany}',
'%% \\exname{Cities 2}'),
"cloze" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'x <- c(-0.17, 0.63, 0.96, 0.97, -0.77)',
'Mean <- mean(x)',
'Sd <- sd(x)',
'Var <- var(x)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{Mean} will return the mean of variable x in the R code above.',
'Given the following numbers: \\\\',
'$',
'-0.17, 0.63, 0.96, 0.97, -0.77.',
'$',
'\\begin{answerlist}',
' \\item What is the mean?',
' \\item What is the standard deviation?',
' \\item What is the variance?',
'\\end{answerlist}',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!', '',
'\\begin{answerlist}',
' \\item The mean is $0.324$.',
' \\item The standard deviation is $0.767515$.',
' \\item The variance is $0.58908$.',
'\\end{answerlist}',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{cloze}',
'%% \\exsolution{0.324|0.767515|0.58908}',
'%% \\exclozetype{num|num|num}',
'%% \\exname{Statistics}',
'%% \\extol{0.01}')
)
} else {
excode <- switch(type,
"schoice" = c(''),
"num" = c('```{r data generation, echo = FALSE, results = "hide"}',
'## DATA GENERATION',
'n <- sample(50:150, 1)',
'y <- rnorm(n, runif(1, 100, 200), runif(1, 10, 15))',
'',
'## QUESTION/ANSWER GENERATION',
'Mean <- round(mean(y), digits = 1)',
'Var <- round(var(y), digits = 1)',
'sd <- sqrt(Var/n)',
'LB <- round(Mean - 1.96*sd, 3)',
'UB <- round(Mean + 1.96*sd, 3)',
'```',
'',
'Question',
'========',
'',
'The daily expenses of summer tourists in Vienna are analyzed. A',
'survey with $`r n`$ tourists is conducted. This shows that the',
'tourists spend on average $`r Mean`$ EUR. The sample variance',
'$s^2_{n-1}$ is equal to $`r Var`$.',
'',
'Determine a $95$ confidence interval for the average daily',
'expenses (in EUR) of a tourist.',
'',
'',
'Solution',
'========',
'',
'The $95$ confidence interval for the average expenses $\mu$ is',
'given by:',
'$$',
'\begin{aligned}',
'& & \left[\bar{y} \, - \, 1.96\sqrt{\frac{s_{n-1}^2}{n}}, \;',
'\bar{y} \, + \, 1.96\sqrt{\frac{s_{n-1}^2}{n}}\right] \\',
'& = & \left[ `r Mean` \, - \, 1.96\sqrt{\frac{`r Var`}{`r n`}}, \;',
'`r Mean` \, + \, 1.96\sqrt{\frac{`r Var`}{`r n`}}\right] \\',
'& = & \left[`r LB`, \, `r UB`\right].',
'\end{aligned}',
'$$',
'',
'',
'Meta-information',
'============',
'extype: num',
'exsolution: `r LB`|`r UB`',
'exname: Confidence interval',
'extol: 0.01'),
"mchoice" = c(''),
"string" = c(''),
"cloze" = c('')
)
}
excode
}
chooserInput <- function(inputId, leftChoices, rightChoices, size = 5, multiple = FALSE)
{
leftChoices <- lapply(leftChoices, tags$option)
rightChoices <- lapply(rightChoices, tags$option)
questionNr <- lapply(if(length(rightChoices)) 1:length(rightChoices) else rightChoices, tags$li)
if(multiple)
multiple <- "multiple"
else
multiple <- NULL
tagList(
singleton(tags$head(
tags$script(src="chooser-binding.js"),
tags$style(type="text/css",
HTML(".chooser-container { display: inline-block; }")
)
)),
div(id=inputId, class="chooser",
div(class="chooser-container chooser-left-container",
HTML("<b>Available</b><br>"),
tags$select(class="left", size=size, multiple=multiple, leftChoices)
),
div(class="chooser-container chooser-center-container",
icon("arrow-circle-o-right", "right-arrow fa-2x"),
tags$br(),
icon("arrow-circle-o-left", "left-arrow fa-2x")
),
div(class="chooser-container chooser-right-container",
HTML("<b>Selected</b><br>"),
tags$select(class="right", size=size, multiple=multiple, rightChoices)
),
div(class="chooser-container chooser-question-container",
HTML("<b>Question Nr.</b><br>"),
tags$ul(class="question", size=size, multiple=multiple, questionNr)
)
)
)
}
flaviobarros/shinyExams documentation built on May 21, 2019, 12:34 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
## global setup file ##
############# Support Functions ###############################
get_template_code <- function(type, markup)
{
if(markup == "LaTeX") {
excode <- switch(type,
"schoice" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'cities <- c("Munich", "Innsbruck", "Zurich", "Amsterdam")',
'countries <- c("Germany", "Austria", "Switzerland", "Netherlands")',
'question <- sample(cities, size = 1)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{question} will return the name of the sampled city in the code above.',
'In which country is Munich?',
'\\begin{answerlist}',
' \\item Austria',
' \\item Germany',
' \\item Switzerland',
' \\item Netherlands',
'\\end{answerlist}',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!',
'Munich is in Germany.',
'\\begin{answerlist}',
' \\item False.',
' \\item True.',
' \\item False.',
' \\item False.',
'\\end{answerlist}',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{schoice}',
'%% \\exsolution{0100}',
'%% \\exname{Mean}',
'%% \\exshuffle{Cities}'),
"num" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'x <- c(-0.17, 0.63, 0.96, 0.97, -0.77)',
'Mean <- mean(x)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{Mean} will return the mean of variable x in the R code above.',
'Calculate the mean of the following numbers: \\\\',
'$',
'-0.17, 0.63, 0.96, 0.97, -0.77.',
'$',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!',
'The mean is $0.324$.',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{num}',
'%% \\exsolution{0.324}',
'%% \\exname{Mean}',
'%% \\extol{0.01}'),
"mchoice" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'x <- c(33, 3, 33, 333)',
'y <- c(3, 3, 1/6, 1/33.3)',
'solutions <- x * y',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{solutions[1]} will return the solution of the first statement.',
'Which of the following statements is correct?',
'\\begin{answerlist}',
' \\item $33 \\cdot 3 = 109$',
' \\item $3 \\cdot 3 = 9$',
' \\item $33 / 6 = 5.5$',
' \\item $333 / 33.3 = 9$',
'\\end{answerlist}',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!', '',
'\\begin{answerlist}',
' \\item False. Correct answer is $33 \\cdot 3 = 99$.',
' \\item True.',
' \\item True.',
' \\item False. Correct answer is $333 / 33.3 = 10$.',
'\\end{answerlist}',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{mchoice}',
'%% \\exsolution{0110}',
'%% \\exname{Simple math}',
'%% \\exshuffle{TRUE}'),
"string" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'cities <- c("Munich", "Innsbruck", "Zurich", "Amsterdam")',
'countries <- c("Germany", "Austria", "Switzerland", "Netherlands")',
'question <- sample(cities, size = 1)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{question} will return the name of the sampled city in the code above.',
'In which country is Munich?',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!',
'Munich is in Germany.',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{string}',
'%% \\exsolution{Germany}',
'%% \\exname{Cities 2}'),
"cloze" = c('<<echo=FALSE, results=hide>>=',
'## DATA GENERATION EXAMPLE',
'x <- c(-0.17, 0.63, 0.96, 0.97, -0.77)',
'Mean <- mean(x)',
'Sd <- sd(x)',
'Var <- var(x)',
'@',
'',
'\\begin{question}',
'%% Enter the question here, you can access R variables with \\Sexpr{},',
'%% e.g., \\Sexpr{Mean} will return the mean of variable x in the R code above.',
'Given the following numbers: \\\\',
'$',
'-0.17, 0.63, 0.96, 0.97, -0.77.',
'$',
'\\begin{answerlist}',
' \\item What is the mean?',
' \\item What is the standard deviation?',
' \\item What is the variance?',
'\\end{answerlist}',
'\\end{question}',
'',
'\\begin{solution}',
'%% Supply a solution here!', '',
'\\begin{answerlist}',
' \\item The mean is $0.324$.',
' \\item The standard deviation is $0.767515$.',
' \\item The variance is $0.58908$.',
'\\end{answerlist}',
'\\end{solution}',
'',
'%% META-INFORMATION',
'%% \\extype{cloze}',
'%% \\exsolution{0.324|0.767515|0.58908}',
'%% \\exclozetype{num|num|num}',
'%% \\exname{Statistics}',
'%% \\extol{0.01}')
)
} else {
excode <- switch(type,
"schoice" = c(''),
"num" = c('```{r data generation, echo = FALSE, results = "hide"}',
'## DATA GENERATION',
'n <- sample(50:150, 1)',
'y <- rnorm(n, runif(1, 100, 200), runif(1, 10, 15))',
'',
'## QUESTION/ANSWER GENERATION',
'Mean <- round(mean(y), digits = 1)',
'Var <- round(var(y), digits = 1)',
'sd <- sqrt(Var/n)',
'LB <- round(Mean - 1.96*sd, 3)',
'UB <- round(Mean + 1.96*sd, 3)',
'```',
'',
'Question',
'========',
'',
'The daily expenses of summer tourists in Vienna are analyzed. A',
'survey with $`r n`$ tourists is conducted. This shows that the',
'tourists spend on average $`r Mean`$ EUR. The sample variance',
'$s^2_{n-1}$ is equal to $`r Var`$.',
'',
'Determine a $95$ confidence interval for the average daily',
'expenses (in EUR) of a tourist.',
'',
'',
'Solution',
'========',
'',
'The $95$ confidence interval for the average expenses $\mu$ is',
'given by:',
'$$',
'\begin{aligned}',
'& & \left[\bar{y} \, - \, 1.96\sqrt{\frac{s_{n-1}^2}{n}}, \;',
'\bar{y} \, + \, 1.96\sqrt{\frac{s_{n-1}^2}{n}}\right] \\',
'& = & \left[ `r Mean` \, - \, 1.96\sqrt{\frac{`r Var`}{`r n`}}, \;',
'`r Mean` \, + \, 1.96\sqrt{\frac{`r Var`}{`r n`}}\right] \\',
'& = & \left[`r LB`, \, `r UB`\right].',
'\end{aligned}',
'$$',
'',
'',
'Meta-information',
'============',
'extype: num',
'exsolution: `r LB`|`r UB`',
'exname: Confidence interval',
'extol: 0.01'),
"mchoice" = c(''),
"string" = c(''),
"cloze" = c('')
)
}
excode
}
chooserInput <- function(inputId, leftChoices, rightChoices, size = 5, multiple = FALSE)
{
leftChoices <- lapply(leftChoices, tags$option)
rightChoices <- lapply(rightChoices, tags$option)
questionNr <- lapply(if(length(rightChoices)) 1:length(rightChoices) else rightChoices, tags$li)
if(multiple)
multiple <- "multiple"
else
multiple <- NULL
tagList(
singleton(tags$head(
tags$script(src="chooser-binding.js"),
tags$style(type="text/css",
HTML(".chooser-container { display: inline-block; }")
)
)),
div(id=inputId, class="chooser",
div(class="chooser-container chooser-left-container",
HTML("<b>Available</b><br>"),
tags$select(class="left", size=size, multiple=multiple, leftChoices)
),
div(class="chooser-container chooser-center-container",
icon("arrow-circle-o-right", "right-arrow fa-2x"),
tags$br(),
icon("arrow-circle-o-left", "left-arrow fa-2x")
),
div(class="chooser-container chooser-right-container",
HTML("<b>Selected</b><br>"),
tags$select(class="right", size=size, multiple=multiple, rightChoices)
),
div(class="chooser-container chooser-question-container",
HTML("<b>Question Nr.</b><br>"),
tags$ul(class="question", size=size, multiple=multiple, questionNr)
)
)
)
}
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Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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