Rank: 1271 based on 57 downloads (last 30 days) and 4 files submitted

Jay St. Pierre

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Personal Profile:: Received PhD in Aerospace Engineering from the University of Colorado at Boulder in 2002.
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Files Posted by Jay					View all 1 - 4 of 4
Updated		File	Tags	Downloads (last 30 days)	Comments	Rating
12 Dec 2009		Quaternion Library for Simulink A library of blocks for manipulating quaternions. Author: Jay St. Pierre	simulink, quaternion, quaternions, block, library, utilities	8	3	4.5 4.5 \| 2 ratings
26 Jul 2009		Quaternion Toolbox Vectorized quaternion functions Author: Jay St. Pierre	quaternion, quaternions, linear algebra, mathematics, aerospace	40	8	3.6 3.6 \| 5 ratings
26 Jul 2009		Test Tools - Utilities for unit tests Tools that facilitate debugging or writing unit test for MATLAB functions. Author: Jay St. Pierre	development environme..., tools, test, debugging, functions, utilities	3	0
26 Jul 2009		Matrix Library for Simulink A set of blocks for manipulating 3x3 and 4x4 matrices. Author: Jay St. Pierre	simulink, matrix, library, manipulating, utilities, aerospace	6	1

Comments and Ratings by Jay		1 - 1 of 1
Updated	File	Comments	Rating
02 Aug 2009	Quaternion Toolbox Vectorized quaternion functions Author: Jay St. Pierre	Lars Barring: It looks like you have a different "qnorm" in your search path prior to the quaternions toolbox. Do a "which qnorm" at the MATLAB command line. -Jay

Comments and Ratings on Jay's Files			View all 1 - 5 of 12
Updated	File	Comment by	Comments	Rating
17 May 2012	Quaternion Library for Simulink A library of blocks for manipulating quaternions. Author: Jay St. Pierre	Ram	Can you please explain how you would add the library to the existing libraries in simulink? Thakns
20 Nov 2009	Quaternion Library for Simulink A library of blocks for manipulating quaternions. Author: Jay St. Pierre	Bindemann, Alan	Overall a nice package. However, I found several issues with the DCM to quaternion block. The block is not designed to accept a [3x3] signal dimension, rather, it expects a 9 element vector. Also, if one uses a reshape on a [3x3] vector to recast is as the 9 element vector one needs to transpose the [3x3] first since the 9 element vector is unpacked in row order, rather than the Simulink standard of column order. Also, the quaternion to DCM block outputs the DCM in row-order, which requires a reshape and transpose to recast as a usable [3x3] signal. Also several of the blocks use Mux blocks as bus creators improperly which will generate errors if strict bus modeling is enabled.
23 Oct 2009	Quaternion Toolbox Vectorized quaternion functions Author: Jay St. Pierre	Brandon	Works well but not very quickly. I think I'll try to find a mex implementation.
02 Aug 2009	Quaternion Toolbox Vectorized quaternion functions Author: Jay St. Pierre	St. Pierre, Jay	Lars Barring: It looks like you have a different "qnorm" in your search path prior to the quaternions toolbox. Do a "which qnorm" at the MATLAB command line. -Jay
28 Jul 2009	Quaternion Toolbox Vectorized quaternion functions Author: Jay St. Pierre	Barring, Lars	QNORM fails the unit test with the following output (R2008b): ============================================ Unit Test for: qnorm ============================================ ---------------------------------------- Insufficient Arguments ---------------------------------------- Function Call: qnorm Expected Error: qnorm() requires one input argument error ~= expected_error *FAILED* ans = Input argument "p" is undefined. err_string = qnorm() requires one input argument ---------------------------------------- Invalid Input ---------------------------------------- Function Call: qnorm(1) Expected Error: Invalid input: must be a quaternion or a vector of quaternions ans = Inf error ~= expected_error *FAILED* ans = Input argument "p" is undefined. err_string = Invalid input: must be a quaternion or a vector of quaternions ---------------------------------------- Column of two quaternions ---------------------------------------- q1 = 1 2 3 4 q2 = 4 3 2 1 ??? Error using ==> qnorm at 13 A probability should be 0<=p<=1, please! Error in ==> check_value at 39 l_test_value = evalin('base', test_value); Error in ==> test_qnorm at 36 failures=failures+check_value(truth_value, test_value); Error in ==> unit_test at 25 test_qnorm; Failures=Failures+failures;

Top Tags Applied by Jay	1 - 5 of 17
aerospace, utilities, library, quaternion, quaternions

Files Tagged by Jay					View all 1 - 4 of 4
Updated		File	Tags	Downloads (last 30 days)	Comments	Rating
12 Dec 2009		Quaternion Library for Simulink A library of blocks for manipulating quaternions. Author: Jay St. Pierre	simulink, quaternion, quaternions, block, library, utilities	8	3	4.5 4.5 \| 2 ratings
26 Jul 2009		Quaternion Toolbox Vectorized quaternion functions Author: Jay St. Pierre	quaternion, quaternions, linear algebra, mathematics, aerospace	40	8	3.6 3.6 \| 5 ratings
26 Jul 2009		Test Tools - Utilities for unit tests Tools that facilitate debugging or writing unit test for MATLAB functions. Author: Jay St. Pierre	development environme..., tools, test, debugging, functions, utilities	3	0
26 Jul 2009		Matrix Library for Simulink A set of blocks for manipulating 3x3 and 4x4 matrices. Author: Jay St. Pierre	simulink, matrix, library, manipulating, utilities, aerospace	6	1

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File	Quaternion Toolbox
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Files Matching Jay's Watch List					View all 1 - 2 of 2
Updated		File	Tags	Downloads (last 30 days)	Comments	Rating
12 Dec 2009		Quaternion Library for Simulink A library of blocks for manipulating quaternions. Author: Jay St. Pierre	simulink, quaternion, quaternions, block, library, utilities	8	3	4.5 4.5 \| 2 ratings
26 Jul 2009		Quaternion Toolbox Vectorized quaternion functions Author: Jay St. Pierre	quaternion, quaternions, linear algebra, mathematics, aerospace	40	8	3.6 3.6 \| 5 ratings

Comments and Ratings Matching Jay's Watch List			1-5 of 11
Date	File	Comment by	Comments	Rating
17 May 2012	Quaternion Library for Simulink A library of blocks for manipulating quaternions.	Ram	Can you please explain how you would add the library to the existing libraries in simulink? Thakns	Comment only
20 Nov 2009	Quaternion Library for Simulink A library of blocks for manipulating quaternions.	Alan Bindemann	Overall a nice package. However, I found several issues with the DCM to quaternion block. The block is not designed to accept a [3x3] signal dimension, rather, it expects a 9 element vector. Also, if one uses a reshape on a [3x3] vector to recast is as the 9 element vector one needs to transpose the [3x3] first since the 9 element vector is unpacked in row order, rather than the Simulink standard of column order. Also, the quaternion to DCM block outputs the DCM in row-order, which requires a reshape and transpose to recast as a usable [3x3] signal. Also several of the blocks use Mux blocks as bus creators improperly which will generate errors if strict bus modeling is enabled.	4
23 Oct 2009	Quaternion Toolbox Vectorized quaternion functions	Brandon	Works well but not very quickly. I think I'll try to find a mex implementation.	4
02 Aug 2009	Quaternion Toolbox Vectorized quaternion functions	Jay St. Pierre	Lars Barring: It looks like you have a different "qnorm" in your search path prior to the quaternions toolbox. Do a "which qnorm" at the MATLAB command line. -Jay	Comment only
28 Jul 2009	Quaternion Toolbox Vectorized quaternion functions	Lars Barring	QNORM fails the unit test with the following output (R2008b): ============================================ Unit Test for: qnorm ============================================ ---------------------------------------- Insufficient Arguments ---------------------------------------- Function Call: qnorm Expected Error: qnorm() requires one input argument error ~= expected_error *FAILED* ans = Input argument "p" is undefined. err_string = qnorm() requires one input argument ---------------------------------------- Invalid Input ---------------------------------------- Function Call: qnorm(1) Expected Error: Invalid input: must be a quaternion or a vector of quaternions ans = Inf error ~= expected_error *FAILED* ans = Input argument "p" is undefined. err_string = Invalid input: must be a quaternion or a vector of quaternions ---------------------------------------- Column of two quaternions ---------------------------------------- q1 = 1 2 3 4 q2 = 4 3 2 1 ??? Error using ==> qnorm at 13 A probability should be 0<=p<=1, please! Error in ==> check_value at 39 l_test_value = evalin('base', test_value); Error in ==> test_qnorm at 36 failures=failures+check_value(truth_value, test_value); Error in ==> unit_test at 25 test_qnorm; Failures=Failures+failures;	Comment only