R:使Ryacas软件包在Windows上无法正常工作 [英] R: trouble making package Ryacas to work on Windows
问题描述
我正在尝试在R
中使用软件包Ryacas
.这是怎么回事:
I am trying to use the package Ryacas
in R
. Here what is going on:
> install.packages("Ryacas")
--- Please select a CRAN mirror for use in this session ---
trying URL 'http://www.stats.bris.ac.uk/R/bin/windows/contrib/2.14/Ryacas_0.2-11.zip'
Content type 'application/zip' length 263424 bytes (257 Kb)
opened URL
downloaded 257 Kb
package ‘Ryacas’ successfully unpacked and MD5 sums checked
The downloaded packages are in
C:\Documents and Settings\yogcal\Local Settings\Temp\RtmpKeuu7m\downloaded_packages
然后我尝试加载Ryacas
:
> library(Ryacas)
Loading required package: XML
C:\Program Files\R\R-2.14.1\library\Ryacas\yacdir\yacas.exe
or C:\Program Files\R\R-2.14.1\library\Ryacas\yacdir\scripts.dat
not found.
Run yacasInstall() without arguments to install yacas.
然后我运行yacasInstall()
:
> yacasInstall()
trying URL 'http://ryacas.googlecode.com/files/yacas-1.0.63.zip'
Content type 'application/x-zip' length 746009 bytes (728 Kb)
opened URL
downloaded 728 Kb
然后,当我尝试一个示例时:
And then when I try an example:
> library(Ryacas)
> yacas("TeXForm(3 * x^2/(2 * (x + 1)) - (x^3) * 2/(2 * (x + 1))^2)",
+ retclass = "unquote")
[1] "Starting Yacas!"
Error in socketConnection(host = "127.0.0.1", port = 9734, server = FALSE, :
cannot open the connection
In addition: Warning message:
In socketConnection(host = "127.0.0.1", port = 9734, server = FALSE, :
127.0.0.1:9734 cannot be opened
>
这是怎么回事?
非常感谢...
推荐答案
将问题归零的一种方法是确保端口处于打开状态:
One way to zero-in on the problem is to make sure the port is open:
1)单击Windows Start
1) Click Windows Start
2)单击All Programs
3)单击Accessories
4)单击Command Prompt
打开DOS窗口
4) Click Command Prompt
to open a DOS window
5)键入cd C:\Program Files\yacas\winrel
6)通过输入yacas --server 9734
7)Yacas应该给您以下反馈Accepting requests from port 9734
7) Yacas should give you the following feedback Accepting requests from port 9734
如果一切正常,那么yacas可以运行并且可以通话了.现在,您可以运行您的R代码.如果它不起作用,则说明yacas有问题.
If everything works up to this point then yacas is running and ready to talk. Now, you can run your R code. If it doesn't work, then you have a problem with yacas.
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