High-Level Functions for Tabulating, Charting and Reporting Survey Data
Add cluster number to a data frame
Add PCA columns along with summary statistics (KMO and Bartlett test) ...
Calculate the mean value of multiple items
Add a column with predicted values from a regression model
Adjust p-values from multiple tests and optionally annotate significan...
Agreement for multiple items
Get configured na numbers
Check whether a column exist and stop if not
Check whether a column selection is categorical
Check whether the object is a dataframe
Check whether a column selection is numeric
Check whether a parameter value is from a valid set
Check whether there is no overlap between two column sets
Get plot for clustering result
Get tables for clustering result
Get variable and value labels from a data set
Convert numeric values to string
Prepare data originating from SoSci Survey or SPSS
Prepare dataframe for the analysis
Convert values to numeric values
One-hot encode selected columns
Prepare data for calculation
Reverse item values
Remove missings and output a message
Remove NA levels
Remove NA numbers
Remove negatives and output a warning
Remove zero values, drop missings and output a message
Round and format selected numeric columns
Cook's distance plot
Normal Q-Q
Residuals vs Fitted plot
Scale-Location (Spread-Location)
Add an object to the report list
Calculate classification performance indicators such as precision and ...
Generate confusion matrix
Calculate agreement coefficients for multiple items
Calculate reliability scores
Insert a name-value-pair into an object attribute
Set an attribute value on selected columns of a data frame
Transfer attributes from one to another object
Calculate correlation and cooccurrence coefficients and test whether t...
Create a factor vector and preserve all attributes
Get the maximum density value in a density plot
Get plot size and resolution for the current output format from the co...
Determine the column used for plotting numbers
Guess plot limits from values
Calculate IQR
Knit volker plots
Prepare markdown content for table rendering
Compact table printing with shortened names and values
Knit volker tables
Calculate outliers
Helper: mean of pairwise agreements (nominal)
Helper: mean of pairwise disagreements (nominal)
Helper function: plot grouped bar chart
Helper function: plot cor and regression outputs
Helper function: Heatmap
Helper function: plot grouped line chart
Helper function: scree plot
Helper function: plot grouped line chart by summarising values
Generate table and plot for agreement analysis
Generate an cluster table and plot
Generate an factor table and plot
Generate an index table and plot
Generate an model table and plot
Split a metric column into categories based on the median
Add vlkr_df class - that means, the data frame has been prepared
Add vlkr_list class
Add the volker class and options
Add the vlkr_rprt class to an object
Add vlkr_tbl class
Calculate lower whisker in a boxplot
Calculate upper whisker in a boxplot
Correlate the values in multiple items with multiple metric columns an...
Correlate the values in multiple items with one metric column and outp...
Effect size and test for comparing multiple variables by multiple grou...
Effect size and test for comparing multiple variables by a grouping va...
Test homogeneity of category shares for multiple items
Output test statistics and effect size from a logistic regression of o...
Output test statistics and effect size for contingency tables
Test homogeneity of category shares
Output effect sizes and test statistics for count data
Output correlation coefficients for multiple items
Output correlation coefficients for items and one metric variable
Compare groups for each item with multiple target items by calculating...
Compare groups for each item by calculating F-statistics and effect si...
Test whether a distribution is normal for each item
Test whether the correlation is different from zero
Output a regression table with estimates and macro statistics
Test whether a distribution is normal
Output effect sizes and test statistics for metric data
Select variables by their postfix
Get plot with factor analysis result
Get tables with factor analysis results
Filter function
Get number of items and Cronbach's alpha of a scale added by add_index...
Angle labels
Get a formatted baseline from attributes of an object.
Calculate standardized betas
Calculate ci values to be used for error bars on a plot
Calculate correlation between two vectors
Detect whether a scale is a numeric sequence
Calculate Eta squared
Calculate the Gini coefficient
Get the labels of values from a codebook
Get the numeric range from the labels
Calculate nmpi
Get the common prefix of character values
Get significance stars from p values
Get a common title for a column selection
Volker style HTML document format
Deprecated Alias for add_index
Printing method for volker plots when knitting
Wrap labels in plot scales
Set column and value labels
Remove all comments from the selected columns
Add missing residual labels in numeric columns that have at least one ...
Remove common prefix from the first column
Replace item value names in a column by their labels
Restore labels from the codebook store in the codebook attribute.
Get the current codebook and store it in the codebook attribute.
Get a label for a key
Plot regression coefficients
Output a regression table with estimates and macro statistics for mult...
Mutate function
Convert a named vector to a list
Volker style PDF document format
Pipe operator
Correlation of categorical items with metric items
Plot percent shares of multiple items compared by a metric variable sp...
Correlation of categorical items with categorical items
Plot percent shares of multiple items compared by groups
Output frequencies for multiple variables
Plot frequencies cross tabulated with a metric column that will be spl...
Plot frequencies cross tabulated with a grouping column
Plot the frequency of values in one column
Output a frequency plot
Heatmap for correlations between multiple items
Multiple items correlated with one metric variable
Correlation of metric items with categorical items
Output averages for multiple variables compared by a grouping variable
Output averages for multiple variables
Correlate two items
Output averages for multiple variables
Output a density plot for a single metric variable
Output a plot with distribution parameters such as the mean values
Prepare the scale attribute values
Printing method for volker lists
Printing method for volker plots
Printing method for volker reports
Printing method for volker tables.
Create table and plot for categorical variables
Create table and plot for metric variables
Select function
Calculate a metric by groups
A skimmer for metric variables
Select variables by their prefix
Correlation of categorical items with metric items
Compare the values in multiple items by a metric column that will be s...
Correlation of categorical items with categorical items
Compare the values in multiple items by a grouping column
Output frequencies for multiple variables
Count values by a metric column that will be split into groups
Output frequencies cross tabulated with a grouping column
Output a frequency table for the values in one column
Output a frequency table
Output a correlation table for item battery and item battery
Output a correlation table for item battery and one metric variable
Correlation of metric items with categorical items
Output the means for groups in one or multiple columns
Output a five point summary table for multiple items
Correlate two columns
Output a five point summary for groups
Output a five point summary table for the values in multiple columns
Output a table with distribution parameters
Get, set, and modify the active ggplot theme
Define a default theme for volker plots
Tidy tibbles
Tidy lm results, replace categorical parameter names by their levels a...
Tidy tribbles
Remove trailing zeros and trailing or leading whitespaces, colons, hyp...
Remove a prefix from a character vector or a factor
Truncate labels
Interpolate an alpha value based on case numbers
Given a vector of hex fill colors, choose an appropriate color for tex...
Get colors for discrete scales
Get colors for polarized scales
Get colors for sequential scales
Resolution settings for plots
Fill colors
Gradient colors
Polarized colors
Maximum number of distinct values to determine whether a column select...
Levels to remove from factors
Numbers to remove from vectors
Whether to remove all missings
Output thresholds
Wrapping threshold
Alpha values
Shapes
Sizes
Word wrap separators
volker: High-Level Functions for Tabulating, Charting and Reporting Su...
Wrap a string
Combine two identically shaped data frames by adding values of each co...
Craft polished tables and plots in Markdown reports. Simply choose whether to treat your data as counts or metrics, and the package will automatically generate well-designed default tables and plots for you. Boiled down to the basics, with labeling features and simple interactive reports. All functions are 'tidyverse' compatible.
Useful links