Quiz 2 on Missing Data in MATLAB

What does NaN stand for in MATLAB?

• Null and NaN

• Not a Number

• Numeric and NaN

• None of the Above

Which function is used to convert non-standard missing values to standard missing values in MATLAB?

• standardizeMissing

• fillmissing

• ismissing

• removeMissing

What will the command 'mean(nanData)' return if nanData contains NaN values?

• 0

• The average of non-NaN values

• Infinity

• NaN

Which function can be used to find the location of NaN values in a dataset?

• missingValues

• locateNaN

• isnan

• findNaN

What does the 'omitnan' option do in the sum function?

• Replaces NaN with zero

• Ignores NaN in the sum

• Counts NaN as one

• Includes NaN in the sum

Which of the following data types can represent missing values in MATLAB?

• Only string

• Numeric, datetime, string, and categorical

• Only categorical

• Only numeric

What does the function 'fillmissing' do?

• Removes missing values

• Replaces missing values with a specified value

• Finds missing values

• Ignores missing values

Which function can be used to check for missing values in a table?

• isMissing

• checkMissing

• findMissing

• ismissing

What happens if you plot a vector containing NaN values?

• NaN values are plotted as zeros

• All points are plotted

• The NaN values cause a break in the plot

• The plot fails to render

What is the output of 'TF = isnan(nanData)' if nanData contains a NaN?

• An error message

• A logical array with one '1'

• A logical array with all zeros

• A numeric array