LeafLabs Garden » Topic: I create a double n=3.33333 how do I have that printed out on the serial port?

LeafLabs Garden » Topic: I create a double n=3.33333 how do I have that printed out on the serial port? http://forums.leaflabs.com/topic.php?id=9164 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:09:07 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20316 Tue, 16 Oct 2012 20:03:25 +0000 josheeg 20316@http://forums.leaflabs.com/ It worked I did that. example. void setup() { } void loop() { SerialUSB.println("Hello World!"); ufsum=12.04l; SerialUSB.println(ufsum,5); } gbulmer on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20285 Sat, 13 Oct 2012 13:13:43 +0000 gbulmer 20285@http://forums.leaflabs.com/ josheeg - have you looked in your distribution to find the file "Print.cpp"? Does that contain this code: <pre><code>void Print::print(double n, int digits) { printFloat(n, digits); }</code></pre> If it does, then HardwareSerial has a version of <code>print</code> which takes two parameters. The first parameter is the double to be printed. The second parameter is the number of digits after the decimal point, so set this value to be the number of decimal places you want to print. josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20282 Fri, 12 Oct 2012 22:33:20 +0000 josheeg 20282@http://forums.leaflabs.com/ A second parameter? I looked where double was defined and still do not know what to modify to make it print further than 2 digits past the decimal. gbulmer on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20264 Thu, 11 Oct 2012 12:05:04 +0000 gbulmer 20264@http://forums.leaflabs.com/ josheeg - have a look in the file "Print.cpp". In my distribution, the function to print a double has the prototype: <code>void Print::print(double n, int digits)</code> so if you have that version in your installation, try supplying a second parameter to set the number of digits. josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20263 Thu, 11 Oct 2012 11:11:06 +0000 josheeg 20263@http://forums.leaflabs.com/ The version of my maple ide is around "maple-ide-0.0.9-linux64.tgz" because I installed 64 bit ubuntu on my laptop and all sort of errors happen trying to get a new one and windows 7 on the other boot. josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20262 Thu, 11 Oct 2012 11:07:23 +0000 josheeg 20262@http://forums.leaflabs.com/ I learned some linear algebra from the manga guide to linear algebra and used the excel spread sheet tutorial sample data to guide me through it. So I was able to do that example on paper with a simple hand calculator the ones without all the functions. I have had the maple print to the terminal in linux Hello World. Now I am trying to print a floating point doulble. The number is 33.33333. I get back 33.33 or 33.34 or something like that. I looked in the documentation here: <a href="http://leaflabs.com/docs/lang/api/serialusb.html#lang-serialusb" rel="nofollow">http://leaflabs.com/docs/lang/api/serialusb.html#lang-serialusb</a> It said this "USBSerial::print(double n) Print n, accurate to 2 digits after the decimal point. " how do I get it to print more after the decimal point? gbulmer on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20244 Tue, 09 Oct 2012 20:59:40 +0000 gbulmer 20244@http://forums.leaflabs.com/ @josheeg - Have you taken mbolivar's advice? <a href="http://forums.leaflabs.com/topic.php?id=1979#post-11457" rel="nofollow">http://forums.leaflabs.com/topic.php?id=1979#post-11457</a> StephenFromNYC on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20242 Tue, 09 Oct 2012 13:02:19 +0000 StephenFromNYC 20242@http://forums.leaflabs.com/ @josheeg, Please read the <a href="http://forums.leaflabs.com/topic.php?id=994">Guidelines for Posting</a>. For example "use a short, descriptive title" and "the version of Maple IDE (e.g. "0.0.11") you are using". If you describe what you have tried doing it would help. You mentioned the tutorial, but you did not say what worked and what did not work. A short piece of code or a pastbin link would be helpful. Rather than invoking "Linear Discriminant Analysis" can you phrase your question in a simpler way? It is not clear to me what you asking and mentioning LDA and linear algebra does not help me interpret your question. For example, are you trying to print to a physical printer, printing to a file, printing to a terminal window, etc.? josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20240 Tue, 09 Oct 2012 09:41:38 +0000 josheeg 20240@http://forums.leaflabs.com/ I create a double n=3.33333 how do I have that printed out on the serial port? I have a maple r5 running linux 64 bit ubuntu I am fallowing the tutorial <a href="http://people.revoledu.com/kardi/tutorial/LDA/index.html" rel="nofollow">http://people.revoledu.com/kardi/tutorial/LDA/index.html</a> and used the manga guide to linear algebra to figure parts out.