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# Peter Corke

### Queensland University of Technology

71 total contributions since 2013

Professional Interests: robotics, computer vision

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Question

How to edit ThingSpeak data gathering script
Long ago I created a ThingSpeak channel to scrape data from a website. I used the template, filled in a bunch of parameters and...

9 maanden ago | 1 answer | 0

### 1

Question

Toolbox export using 19a style project files
I'm very confused about these new project files. I have a .prj file that I've used for ages to package my code into a .mltbx fi...

12 maanden ago | 1 answer | 2

### 1

Solved

How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

meer dan een jaar ago

Problem

Invert a 3D rotation matrix
Given a 3D rotation matrix, belonging to the matrix group SO(3), compute its inverse without using the functions |inv()| or |pin...

meer dan een jaar ago | 0 | 13 solvers

Problem

Invert a 3D rigid-body transformation
Given an SE(3) matrix representing a rigid-body motion, compute its inverse without using |inv()| or |pinv()| .

meer dan een jaar ago | 1 | 9 solvers

Problem

Create a 3D rotation matrix
Consider an arbitrary coordinate frame {A}. Consider another coordinate frame {B} which has the same origin as {A} but is rotat...

meer dan een jaar ago | 1 | 8 solvers

Problem

Create a 3D rotation matrix from roll-pitch-yaw angles
Consider an aerospace application where the world reference coordinate frame {W} and a body-fixed coordinate frame {B}. The ori...

meer dan een jaar ago | 1 | 6 solvers

Problem

Orientation of a 3D coordinate frame
The orientation of a body-fixed frame {B} with respect to the world frame {W} is described by an SO(3) rotation matrix. Compute...

meer dan een jaar ago | 1 | 5 solvers

Problem

Determine roll pitch yaw angles from a 3D rotation matrix
Consider an aerospace application where the world reference coordinate frame {W} and a body-fixed coordinate frame {B}. The ori...

meer dan een jaar ago | 1 | 3 solvers

Solved

Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

meer dan een jaar ago

Solved

Create a vector
Create a vector from 0 to n by intervals of 2.

meer dan een jaar ago

Solved

Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

meer dan een jaar ago

Solved

Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

meer dan een jaar ago

Solved

Whether the input is vector?
Given the input x, return 1 if x is vector or else 0.

meer dan een jaar ago

Solved

Find max
Find the maximum value of a given vector or matrix.

meer dan een jaar ago

Solved

Get the length of a given vector
Given a vector x, the output y should equal the length of x.

meer dan een jaar ago

Solved

inner product of two vectors
inner product of two vectors

meer dan een jaar ago

Solved

Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

meer dan een jaar ago

Submitted

Spatial Math Toolbox
Spatial math primitives for MATLAB

Problem

Homogeneous lines and points in 2D: problem 1
In high school we learn the line equation y = mx + c where m is the gradient and c is the intercept. However this form is prob...

meer dan een jaar ago | 1 | 9 solvers

Problem

Pose from bearing angles in 2D
A robot moving on the plane has a sensor that measures the bearing angle to two mapped landmarks, that is, the world frame coord...

meer dan een jaar ago | 2 | 13 solvers

Problem

Composing relative poses in 2D: problem 1
We consider a world reference frame denoted by {0} which has its x-axis pointing east and its y-axis pointing north. There i...

meer dan een jaar ago | 1 | 21 solvers

Problem

Composing relative poses in 2D: problem 1
We consider a world reference frame denoted by {0} which has its x-axis pointing east and its y-axis pointing north. There i...

meer dan een jaar ago | 1 | 27 solvers

Problem

Twists in 2D
So far we have represented the pose of an object in the plane using a homogeneous transformation, a 3x3 matrix belonging to the ...

meer dan een jaar ago | 1 | 8 solvers

Problem

Pose interpolation in 2D
Consider two poses represented by homogeneous transformation matrices: |T1| and |T2|. Write an algorithm to interpolate between...

meer dan een jaar ago | 1 | 11 solvers

Problem

Relative points in 2D: problem 3
The 2D pose of a robot, with respect to a world coordinate frame {O}, is described by a 3x3 homogenous transform matrix T. A la...

meer dan een jaar ago | 1 | 18 solvers

Problem

Relative points in 2D: problem 1
The 2D pose of a robot, with respect to a world coordinate frame {O}, is described by a 3x3 homogenous transform matrix T. A la...

meer dan een jaar ago | 1 | 46 solvers

Problem

Relative points in 2D: problem 2
The 2D pose of a robot, with respect to a world coordinate frame {O}, is described by a 3x3 homogenous transform matrix T. A la...

meer dan een jaar ago | 1 | 28 solvers

Problem

Relative pose in 2D: problem 1
We consider a world reference frame denoted by {0} which has its x-axis pointing east and its y-axis pointing north. There is a...

meer dan een jaar ago | 2 | 79 solvers

Problem

Relative pose in 2D: problem 2
We consider a world reference frame denoted by {0} which has its x-axis pointing east and its y-axis pointing north. There is a...

meer dan een jaar ago | 1 | 37 solvers