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r-cas
caracas:Computer Algebra
Computer algebra via the 'SymPy' library (<https://www.sympy.org/>). This makes it possible to solve equations symbolically, find symbolic integrals, symbolic sums and other important quantities.
Maintained by Mikkel Meyer Andersen. Last updated 30 days ago.
82.0 match 24 stars 6.80 score 87 scripts 1 dependents
mikewlcheung
symSEM:Symbolic Computation for Structural Equation Models
A collection of functions for symbolic computation using the 'caracas' package for structural equation models and other statistical analyses. Among its features is the ability to calculate the model-implied covariance (and correlation) matrix and the sampling covariance matrix of variable functions using the delta method.
Maintained by Mike Cheung. Last updated 11 months ago.
caracasstructural-equation-modelingsymbolic-calculations
12.1 match 4 stars 3.60 score 10 scripts
cran
timeDate:Rmetrics - Chronological and Calendar Objects
The 'timeDate' class fulfils the conventions of the ISO 8601 standard as well as of the ANSI C and POSIX standards. Beyond these standards it provides the "Financial Center" concept which allows to handle data records collected in different time zones and mix them up to have always the proper time stamps with respect to your personal financial center, or alternatively to the GMT reference time. It can thus also handle time stamps from historical data records from the same time zone, even if the financial centers changed day light saving times at different calendar dates.
Maintained by Georgi N. Boshnakov. Last updated 6 months ago.
3.0 match 1 stars 7.37 score 713 dependents