Releases: paulnorthrop/smovie
smovie: Some movies to teach statistical concepts 1.1.6
smovie 1.1.6
Bug fixes
- Fixed issues with the incorrect use of \itemize in some Rd files.
smovie: Some movies to teach statistical concepts
smovie 1.1.5
Bug fixes and minor improvements
-
Corrected the link to
cltq()
in the mainsmovie
help page. -
Create the help file for the package correctly, with alias smovie-package.
-
Activated 3rd edition of the
testthat
package
smovie: Some movies to teach statistical concepts
smovie 1.1.4
Bug fixes and minor improvements
-
The BWidget Tcl/Tk module is no longer a system requirement for the rpanel package on which smovie depends. rpanel checks whether BWidget is available wen it is required and provides instruction if it is not. This task has been removed from smovie.
-
In help files and vignettes DOIs are used rather than URLs.
-
A typo in a section heading in the vignette has been corrected: "simply" becomes "a simple".
-
LazyData: TRUE
has been removed from DESCRIPTION, because there is no data/ directory in smovie.
smovie: Some movies to teach statistical concepts
smovie 1.1.3
UCL Eugenics Inquiry
Explicit references to (Karl) Pearson have removed from the package following the Inquiry into the History of Eugenics at UCL.
Bug fixes and minor improvements
-
Errors in test name strings supplied to
testthat::test_that()
have been corrected, to avoid CRAN package check ERRORs. -
In
wws()
the gradient of the log-likelihood was unnecessarily labelled with a red "score" when the null value of theta0 is less than the MLE of theta. This has been removed. -
In
wws()
, whenmodel = "norm"
the value ofmu
could not be passed as described. This has been corrected. -
In
shypo()
there was a bug that meant that the plots did not behave as intended whenmu0
is not equal to (the default value of) 0. This has been corrected. -
In the documentation for
shypo()
a minor typo at the end of the Details section has been corrected: "based on the current value of n" has been deleted. -
In
discrete()
radio buttons have been added to switch between the version of the the geometric distribution based on the number of trials up to including the first success and the number of failures until the first success. -
In
discrete()
a typo has been corrected in the 4th line of the documentation of the argumentdistn
: "hypergeometric" should have read "negative binomial".
smovie: Some movies to teach statistical concepts
smovie 1.1.2
Dependencies
- The packages
revdbayes
andSuppDists
have been demoted from Imports to Suggests. An error is thrown if actions that require either of these packages occurs and that packae is not available.
smovie: Some Movies to Illustrate Concepts in Statistics
smovie 1.1.1
New features
-
New movie:
cltq()
. Central Limit Theorem for sample quantiles. Illustrates the sampling distribution of the sample quantiles and the central limit theorem for sample quantiles. -
New movie:
mean_vs_median()
. Compares the sampling distributions of the mean and median for random samples from either a standard normal distribution or a standard Student t distribution. -
pkgdown documentation at https://paulnorthrop.github.io/smovie/
Bug fixes and minor improvements
-
In
ett()
the sample sizen
is now allowed to drop to 1 for those cases in which the normalising constants underlying the calculations are finite, such as the exponential, uniform and generalised Pareto distributions. Otherwise, 2 is the smallest allowable value forn
. -
When the Wald, Wilks and Score tests movie
wws()
is called from the main menu, viamovies()
a binomial example is used, so that the differences between the test statistics can be seen. -
Adjustments have been made to the
wws()
movie to ensure that the plot stays completely still during the animations.
smovie: Some Movies to Illustrate Concepts in Statistics
smovie 1.0.1
Bug fixes and minor improvements
-
The way that objects modified inside the plotting function are saved has been changed to enable two or more panels produced by the same smovie function to operate simultaneously and independently, even if the call is exactly the same.
-
The argument
plot_par
in the functionsdiscrete
andcontinuous
didn't work properly. It does now. -
Both
hscale
andvscale
may be passed to the main menu functionmovies
to scale the size of the graphics panel horizontal and vertically. -
In
ett()
andclt()
the legend position in plots of cdfs has been moved to "topleft" better to avoid overlapping the contents of the plot. The argumentleg_cex
has been added to enable manual control of the size of the legends. -
That smovie requires the R extension BWidget (via its dependence on the package rpanel) is noted in the README file. If BWidget is not installed then a message is given to explain why the smovie functions don't work.
smovie: Some Movies to Illustrate Concepts in Statistics
Some movies to teach statistical concepts
What does smovie do?
The smovie
package provides movies to help students to understand statistical concepts. The rpanel
package is used to create interactive plots that move to illustrate key statistical ideas and methods. The movies cover the topics of probability distributions; sampling distributions of the mean (central limit theorem), the maximum (extremal types theorem) and the (Fisher transformation of the) correlation coefficient; simple linear regression; hypothesis testing.
An example
The function wws
produces a movie to visualise the Wald, Wilks and score likelihood-based test statistics, for a model with a scalar unknown parameter. The user can change the value of the parameter under a simple null hypothesis and observe the effect on the test statistics. The following code uses the log-likelihood from a binomial experiment and considers the null hypothesis that the success probability θ is equal to θ0. The user may specify their own log-likelihood.
wws(theta0 = 0.5)
Installation
To get the current released version from CRAN:
install.packages("smovie")
Vignettes
See vignette("smovie-vignette", package = "smovie")
for an overview of the package.