Comments for Algorithm-Forge

Comment on Using JavaGD in Java applications by Zoe

Zoe — Thu, 20 Oct 2011 18:02:30 +0000

Thanks for the helpful post.
I am not very familar with R. I have just tried your example, it doesn’t work on my PC (Windows). I am wondering if it is because of the way to environment variable in Windows should be different than the code in your example as following:
engine.eval(“.setenv <- if (exists(\"Sys.setenv\")) Sys.setenv else Sys.putenv");
engine.eval(".setenv(\"JAVAGD_CLASS_NAME\"=\"JavaGDExample\")");

How could I set the environment variable in PC?

Thanks a lot,
Zoe

Comment on Using JavaGD in Java applications by Kornelius Rohmeyer

Kornelius Rohmeyer — Thu, 08 Sep 2011 21:07:00 +0000

Hi Michael,
yes of course the extensibility is the goal! Of course you can just write a main method with the following lines and nothing else in the class:

Rengine engine = new Rengine(new String[] {"--vanilla"}, true, null);
engine.eval("library(JavaGD)");
engine.eval("JavaGD()");
engine.eval("plot(rnorm(100))");

But that’s not the point.

Best regards, Kornelius.

Comment on Using JavaGD in Java applications by Michael Theobald

Michael Theobald — Thu, 08 Sep 2011 19:58:31 +0000

Eliminating the import statements for the java.awt and javax.swing classes as well as the doOpen() and doClose() methods and the WindowListener code makes no difference in the function of this class as published. Only the code in the main() method appears to be used. Therefore, in my opinion, the code example could either be made more complete or made shorter.

It does work!
Michael

Comment on Using JavaGD in Java applications by Kornelius Rohmeyer

Kornelius Rohmeyer — Thu, 14 Jul 2011 10:41:50 +0000

Dear Michelle, please try to add the directory where the file JavaGDExample.class is found to the CLASSPATH. If you call java directly in the directory, it is simply the following in the bash on unix machines: export CLASSPATH=\$CLASSPATH:.

Comment on Using JavaGD in Java applications by Michelle

Michelle — Wed, 13 Jul 2011 20:56:35 +0000

Hi there,

Thanks for the helpful post. When I run your example, I get this error:

Exception in thread “Thread-1″ java.lang.NoClassDefFoundError: JavaGDExample
at org.rosuda.JRI.Rengine.rniEval(Native Method)
at org.rosuda.JRI.Rengine.eval(Rengine.java:549)
at org.rosuda.JRI.Rengine.eval(Rengine.java:527)
at gov.pnl.mpv.views.JavaGDExample.main(JavaGDExample.java:42)
Caused by: java.lang.ClassNotFoundException: JavaGDExample
at java.net.URLClassLoader[latex cssclass="latex-inline"]1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher[/latex]AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
… 4 more

Do you have any suggestions?

Comment on Linux USB driver for the Arexx TL-500 – Part II by David

David — Sat, 23 Apr 2011 19:43:13 +0000

Hi I have recently got a TL-300 and using this code as a base I have integrated it into my monitoring system. I use a combination of hardware - 1-wire, X10, power monitoring, UPS and now Arexx. The code has been modded to send the values from the sensors using TCP/IP to a server process which holds all the values. This is then interrogated to produce web based graphs. See the website for more details. The temperature link shows 4 temperatures. Outside temp is from a 1-wire sensor, study is from the energy monitor and teh other two are the Arexx sensors.

Comment on Linux USB driver for the Arexx TL-500 – Part II by John

John — Tue, 12 Apr 2011 08:56:45 +0000

Thanks for the Arexx decoding and information. It has formed the basis of a kernel module which can be downloaded from git@github.com:drystone/tlx00.git

Comment on Linux USB driver for the Arexx TL-500 – Part II by Sven Velt

Sven Velt — Sat, 19 Feb 2011 16:27:35 +0000

Hi!

Negative temperatures are working now. See m68k’s post.

But there’s another problem: Humidity over 60%. See http://www.arexx.com/forum/viewtopic.php?f=43&t=1324 (german) for a longer post.

Solution: Change formula for humidity.

Replace

0.6 + value * 0.03328

with

0.698847572766711 + 0.0322868348833273*value + 0.00000175838509577984*value*value – 0.000000000764068120532725*value*value*value

Bye

Sven

Comment on Linux USB driver for the Arexx TL-500 – Part II by m68k

m68k — Tue, 07 Dec 2010 16:27:58 +0000

According to http://www.arexx.com/forum/viewtopic.php?f=43&t=1060 the conversion from raw value to degrees Celsius is supposed to be T = ((short int)(raw_value)) * 0.0078125.

The cast to a signed 16 bit int is important for handling temperatures below zero.

Sensor type can be detected as (0xf000 & sensor_id) which gives 0×2000 for temperature and 0×4000 for humidity sensors.

The simple logging application described at http://rndhax.blogspot.com/ has been updated with these changes.

Comment on Linux USB driver for the Arexx TL-500 – Part II by Sven Velt

Sven Velt — Fri, 26 Nov 2010 08:42:46 +0000

First: Thank you for your great work!

“Further investigation shows us that we can calculate the measurements [...] temperature sensors TL-3TSN by (Rawdata * 0.0078) °C. ”

Well, that seems to be true for positive values – but not for negative. This night my TL-3TSN recorded a stalled raw value of “7″ for about 5 hours. Other temperature sensors got a temperature of -2.0C.

The specs of TL-3TSN tell us that they work from -30C to +80C… so there must be an other bit/byte which indicates negative temperatures. I’ll now active a dump data file in my daemon – maybe it could help finding the missing informations.

Bye & THX again for your work so far!

Sven