#### quaternions and examples to test with tia sal22

Greetings All

I have a couple of matlab M files that use quaternions,  I would like to test them out but I'm having a hard time finding good quaternion example problems that show the process/the work can anybody reccommed some or a site that has some?

tia sal22


 0
ratullloch_delthis
1/12/2011 5:24:57 PM
comp.soft-sys.matlab 208224 articles. 7 followers. lunamoonmoon (258) is leader.

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On Jan 12, 7:24=A0am, ratullloch_delthis <ratullloch_delt...@gmail.com>
wrote:
> Greetings All
>
> I have a couple of matlab M files that use quaternions, =A0I would like t=
o test them out but I'm having a hard time finding good quaternion example =
problems that show the process/the work can anybody reccommed some or a sit=
e that has some?
>
> tia sal22

For those who want to know I'm trying to test rotation around an
arbitrary axis.

 0
Rick
1/12/2011 5:46:19 PM
ratullloch_delthis <ratullloch_delthis@gmail.com> wrote in message <JtlXo.559683$pX3.162527@en-nntp-11.dc1.easynews.com>... > Greetings All > > I have a couple of matlab M files that use quaternions, I would like to test them out but I'm having a hard time finding good quaternion example problems that show the process/the work can anybody reccommed some or a site that has some? > > tia sal22 Can't you do it by hand and compare?   0 Husam 1/12/2011 6:02:05 PM On Jan 12, 8:02=A0am, "Husam Aldahiyat" <numand...@gmail.com> wrote: > ratullloch_delthis <ratullloch_delt...@gmail.com> wrote in message <JtlXo= ..559683$pX3.162...@en-nntp-11.dc1.easynews.com>...
> > Greetings All
>
> > I have a couple of matlab M files that use quaternions, =A0I would like=
to test them out but I'm having a hard time finding good quaternion exampl=
e problems that show the process/the work can anybody reccommed some or a s=
ite that has some?
>
> > tia sal22
>
> Can't you do it by hand and compare?

I'm looking for example problems that show the work/answer so I will
know that it is working correctly.  If I make up something out of thin
air I won't know the correct answer.

 0
Rick
1/12/2011 6:36:04 PM
Rick T <ratulloch@gmail.com> wrote in message <4e83ec0b-d16c-459a-8c65-91aec43b326f@j25g2000vbs.googlegroups.com>...
> On Jan 12, 8:02 am, "Husam Aldahiyat" <numand...@gmail.com> wrote:
> > ratullloch_delthis <ratullloch_delt...@gmail.com> wrote in message <JtlXo.559683$pX3.162...@en-nntp-11.dc1.easynews.com>... > > > Greetings All > > > > > I have a couple of matlab M files that use quaternions, I would like to test them out but I'm having a hard time finding good quaternion example problems that show the process/the work can anybody reccommed some or a site that has some? > > > > > tia sal22 > > > > Can't you do it by hand and compare? > > I'm looking for example problems that show the work/answer so I will > know that it is working correctly. If I make up something out of thin > air I won't know the correct answer. Maybe these submissions can help you: http://www.mathworks.com/matlabcentral/fileexchange/24247-eulerfixed-angles-properties http://www.mathworks.com/matlabcentral/fileexchange/20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors   0 Husam 1/12/2011 6:48:08 PM  Reply: Similar artilces about - quaternions and examples to test with tia sal22: US-TX-Austin: RF Technician, experience setting up and calibrating test setups (45359532428) US-TX-Austin: RF Technician, experience setting up and calibrating test setups (45359532428) ============================================================================================ Position: RF Technician Reference: ZYD00151 Location: Austin TX Duration: Skills: Experience working at high frequency (1 GHz and higher). Demonstrated hands-on experience setting up and calibrating test setups, including equipment such as network analyzers. Proven experience automating data collection using software such as ... questions about STL erase example I am reading a STL example: bool badValue(int x); // return whether x is 'bad'. vector<int> c; c.erase( remove_if(c.begin(), c.end(), badValue), c.end()); My question is the above code, does it remove ONLY THE FIRST item where badValue return false or ALL ITEMs where badValue return false. Thank you. Allerdyce.John@gmail.com wrote: > vector<int> c; > c.erase( remove_if(c.begin(), c.end(), badValue), c.end()); > > My question is the above code, does it remove ONLY THE FIRST item where > badValue return false or > ALL ITEMs where badValue return false.... simple test Why does this test as not true. if (!1==2) echo 'true'; else echo 'nottrue'; It seems like it should be true. groups2@reenie.org wrote: > Why does this test as not true. > > if (!1==2) echo 'true'; else echo 'nottrue'; > > It seems like it should be true. > IMHO Operator precedence. you are negating 1 instead the whole expression. How to negate whole expression: if (!(1==2)) echo 'true'; else echo 'nottrue'; Hendri Kurniawan On May 2, 12:43 am, Hendri Kurniawan <ask...@email.com> wrote: > grou...@reenie.org w... US-TX-Austin: Sr Test/Product Eng., Mixed-signal Eng., ATE Platforms; Perm (45343914403) US-TX-Austin: Sr Test/Product Eng., Mixed-signal Eng., ATE Platforms; Perm (45343914403) ======================================================================================== Position: Sr Test/Product Eng. Reference: SMC01826 Location: Austin TX Duration: Perm Skills: BS in Electrical or Computer Engineering required 5+yrs exp in mixed-signal Product, Test, or Applications Engineering Exp with mixed-signal ATE platforms (Teradyne, Agilent, LTX, or Credence) Exp with mixed-signal lab equ... Test for a phone number without any hyphens? I have been trying to work out a regular expression to test for ONLY numbers, no hyphens so that I can accept only hyphen-less phone numbers...I have had no luck Any ideas out there... TIA, Miki Michelle said: > >I have been trying to work out a regular expression to test for ONLY numbers, no >hyphens so that I >can accept only hyphen-less phone numbers...I have had no luck What have you tried, and what are you using as a reference? /^\d+$/ ...

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