| Title: | Interface to the Computer Algebra System 'Giac' |
| Version: | 1.0.1 |
| Description: | 'Giac' https://www-fourier.ujf-grenoble.fr/~parisse/giac/doc/en/cascmd_en/cascmd_en.html is a general purpose symbolic algebra software. It powers the graphical interface 'Xcas'. This package allows to execute 'Giac' commands in 'R'. |
| License: | GPL-3 |
| URL: | https://github.com/stla/giacR |
| BugReports: | https://github.com/stla/giacR/issues |
| Imports: | chromote (≥ 0.1.2), jsonlite, pingr, processx, R6, utils |
| Encoding: | UTF-8 |
| RoxygenNote: | 7.2.3 |
| SystemRequirements: | Chromium-based browser (Google Chrome, Brave, ...) |
| NeedsCompilation: | no |
| Packaged: | 2024-04-28 15:19:48 UTC; SDL96354 |
| Author: | Stéphane Laurent [aut, cre], Renée De Graeve [cph] (Giac), Bernard Parisse [cph] (Giac) |
| Maintainer: | Stéphane Laurent <laurent_step@outlook.fr> |
| Repository: | CRAN |
| Date/Publication: | 2024-04-28 20:10:02 UTC |
R6 class to access to Giac
Description
Creates an object allowing to execute Giac commands.
Methods
Public methods
Method new()
Create a new Giac instance.
Usage
Giac$new(chromePath = find_chrome())
Arguments
chromePathpath to the Chrome executable (or Chromium, Brave, etc); if
find_chrome()does not work, you can set the environment variableCHROMOTE_CHROMEto the path and it will work
Returns
A Giac object.
Method execute()
Execute a Giac command.
Usage
Giac$execute(command, timeout = 10000)
Arguments
commandthe command to be executed given as a character string
timeouttimeout in milliseconds
Returns
The result of the command in a character string.
Examples
if(!is.null(chromote::find_chrome())) {
giac <- Giac$new()
giac$execute("2 + 3/7")
giac$execute("integrate(ln(x))")
giac$close()
}
Method implicitization()
Gröbner implicitization (see examples)
Usage
Giac$implicitization( equations, relations = "", variables, constants = "", timeout = 10000 )
Arguments
equationscomma-separated equations
relationscomma-separated relations, or an empty string if there is no relation; the relations between the constants must placed first, followed by the relations between the variables
variablescomma-separated variables
constantscomma-separated constants, or an empty string if there is no constant
timeouttimeout in milliseconds
Returns
The implicitization of the equations.
Examples
library(giacR)
if(!is.null(chromote::find_chrome())) {
giac <- Giac$new()
giac$implicitization(
equations = "x = a*cost, y = b*sint",
relations = "cost^2 + sint^2 = 1",
variables = "cost, sint",
constants = "a, b"
)
giac$close()
}
Method close()
Close a Giac session
Usage
Giac$close()
Returns
TRUE or FALSE, whether the session has been closed.
Examples
## ------------------------------------------------
## Method `Giac$execute`
## ------------------------------------------------
if(!is.null(chromote::find_chrome())) {
giac <- Giac$new()
giac$execute("2 + 3/7")
giac$execute("integrate(ln(x))")
giac$close()
}
## ------------------------------------------------
## Method `Giac$implicitization`
## ------------------------------------------------
library(giacR)
if(!is.null(chromote::find_chrome())) {
giac <- Giac$new()
giac$implicitization(
equations = "x = a*cost, y = b*sint",
relations = "cost^2 + sint^2 = 1",
variables = "cost, sint",
constants = "a, b"
)
giac$close()
}