New Features

Faculty Dashboard

Create groups (classes), create private dataset repositories, and share dataset repositories with selected groups. The Rguroo Dashboard also allows you to send emails to members of each group. Click here for the Rguroo Dashboard Quick Guide.

Time Series

Create time series and diagnostic plots, modeling, forecasting, and differencing. See below for more details.

Variance Inference

Perform tests of hypotheses and construct confidence intervals for variance and standard deviation using chi-square and simulation-based methods. See below for more details.

Art of Stat Applets

Art of Stat Applets is a collection of powerful interactive applets for illustrating statistical concepts. See the section Applets-Calculators in the Rguroo Application.

Analytics

Time Series

A new Time Series function is added with the following options:

  • Data options: Upload data, transform variables or generate data using R code Various time specification options
  • Concurrent analysis of one or more time series data
  • Highly customizable time series plots
  • Smoothing and modeling options: Moving average, Holt-Winters, Double Exponential, Exponential
  • Forecasting including prediction intervals and plots
  • Diagnostic plots and tests of hypotheses
  • Differencing (regular and seasonal)

Variance Inference

A new function is added for single population variance (standard deviation) inference. This function has the following features:

  • Data options: Analyses can be performed using summary statistics or raw data
  • Confidence intervals for variance or standard deviation using Chi-square or Bootstrap methods
  • test of hypothesis about variance or standard deviation using Chi-square or simulation-based methods
  • Output includes p-value and critical region graphs

Plots

Mosaic Plot

You can create Mosaic plots within the Contingency Tables function in the Analytics Toolbox.

Time Series Plot

You can draw time series plots for one or more time series data concurrently within the Time Series function in the Analytics Toolbox.

Bar Plot

An option is added to order the bars in a bar plot according to increasing or decreasing counts (proportion) values. An additional option allows ordering based on the order of the levels that appear in the dataset.

Pie Chart

An option is added to order the pie slices in a pie chart according to increasing or decreasing counts (proportion) values. An additional option allows ordering based on the order of the levels that appear in the dataset.

Legends

A default title is added to the legends. This default can be overwritten in the Details section for each plot.

SVG format

The default file type for plots has changed from PNG to SVG (Scalable Vector Graphics). The SVG format allows scaling the image up and down as needed without losing any quality.

Note that in addition to the SVG format, you can select the file formats PNG, JPEG, and BMP for your plots in Details for each plot under the section Image, Plot, and Figure Attributes.

Data

Factor and Label/ID Settings

The change in default settings mainly affects large datasets. Default settings for ID/Label and Factor/Categorical variables have been updated to allow a larger number of factor levels. The following rules are applied to classify variables when data are initially uploaded to Rguroo:

  • If a dataset has 50 or fewer cases, all categorical (string) variables are classified as Factor/Categorical.
  • If a dataset has more than 50 cases and at most 1000 cases, categorical (string) variables whose number of levels is equal to the number of cases are classified as Label/ID, and otherwise, they are classified as Factor/Categorical. -If a dataset has more than 1000 cases, any categorical (string) variable with more than 1000 levels is classified as Label/ID and any categorical variable with 1000 or fewer levels is classified as Factor/Categorical.

When changing attributes of a variable in the Variable Type Editor, any variable classified as Factor/Categorical can be reclassified as Label/ID. - Any variable classified as Label/ID can be reclassified as Factor/Categorical as long as its number of levels is at most 1000.

Dataset Repository

  • In the Dashboard, you (faculty only) can create private dataset repositories to share with groups that you create.

  • The following dataset repositories have been added to public dataset repositories:

    • Rguroo Workbook, Jamshidian and Wynne, Wiley
    • OpenIntro Statistics
    • Introductory Statistics,10th Edition, Prem Mann, Wiley
    • OpenStax Statistics

Other Additions

  • You can combine levels of a factor within the Level Editor by selecting the levels and providing a single label for the combined levels.
  • A refresh button sign in button has been added to reload plots or reports, if necessary. This option is useful if the report or graphs are very large and the browser cannot load them in their entirety. Clicking on the refresh button one or more times allows that browser to load the entire report, if the report is not completely loaded. Note that this functionality is different from clicking on the Preview button. The Preview button runs the program and loads the reports or graphs. The refresh button only reloads the generated reports or graphs without running the report again.
  • Added population and sample coefficient of variation (CV) and mean absolute deviation to the function Numerical Summaries
  • Removed restrictions such as the use of loops in the Transform function
  • When writing R codes, R error messages are more informative.
  • The default values in pie chart have been changed to get a better looking pie chart.
  • Legend titles are added to legends by default. The default title can be changed in Details.
  • By default, case numbers are no longer showing in the data Viewer. You can change this default by right-clicking on a column header to view the case numbers.

NOTE:

To ensure that you get the latest version of Rguroo loaded into your browser correctly, always login to Rguroo by using the sign in button button on the top-right of the Rguroo website https://www.rguroo.com.

If you log in to Rguroo via Canvas, the latest version of Rguroo always gets uploaded automatically.