Andrew Horchler

Last seen: 22 days ago | Active since 2012

Followers: 1 Following: 0

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We're going to the Moon! I'm the Chief Research Scientist at Astrobotic heading their Future Missions and Technology team (https://astrobotic.com/technology). My Ph.D. in Mechanical Engineering at Case Western Reserve University was in the area of biologically inspired robotics with particular interests in mechanical design, soft robotics, dynamical systems, computational neuroscience, and numerical simulation. I have over 25 years of experience with Matlab and C.

Programming Languages:
Python, C++, C, Javascript, MATLAB, HTML, CSS, Arduino, Shell
Spoken Languages:
English, French

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Approximation of Pi
Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given number of...

6 months ago

Solved

radius of a spherical planet
You just measured its surface area, that is the input.

6 months ago

Solved

MATLAB Basic: rounding
Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

6 months ago

Solved

Toeplitz Matrix
For a given square matrix of order n-by-n check whether this is a Toeplitz matrix or not. Return true if it is.

10 months ago

Solved

Mysterious digits operation (easy)
What is this digit operation? 0 -> 0 1 -> 9 121 -> 9 44 -> 6 15 -> 5 1243 -> 7 ...

10 months ago

Submitted

SDETools
Matlab Toolbox for the Numerical Solution of Stochastic Differential Equations (SDEs)

4 years ago | 3 downloads |

Submitted

sgolayfilt
Savitzky-Golay differentiation filters

7 years ago | 10 downloads |

Submitted

wrightOmegaq
Complex double-precision evaluation of the Wright omega function

8 years ago | 1 download |

Submitted

waittext
Display updating line of text or textual waitbar in Matlab Command Window

8 years ago | 2 downloads |

Submitted

quasicrystal
Generate movie, animated GIF, or image of a quasicrystal via sum of plane waves

8 years ago | 1 download |

Submitted

rgb2map
Convert RGB colors to indexed colormap colors

8 years ago | 1 download |

Submitted

QTWriter
Export QuickTime Movies with Matlab

8 years ago | 1 download |

Submitted

notify
Display OS X notification message window from Matlab

8 years ago | 1 download |

Submitted

int2bin - bin2int
Convert integer datatype to a binary string and back

8 years ago | 1 download |

Submitted

polyfitsym
Fit symbolic polynomial to data

8 years ago | 1 download |

Submitted

char2hex - hex2char
Convert decimal integer string to hexadecimal representation and back

8 years ago | 4 downloads |

Submitted

circfit
Matlab function for least squares fitting of X-Y data to a circle

8 years ago | 33 downloads |

Submitted

cdiff
First- and second-order complex step derivative approximation

8 years ago | 1 download |

Submitted

DynamixelTools
Matlab Toolbox to control ROBOTIS Dynamixel actuators with the OpenCM9.04 microcontroller

8 years ago | 2 downloads |

Submitted

rigidtform
Optimal rotation and translation between corresponding points

8 years ago | 2 downloads |

Submitted

Passive-Dynamic-Walking
Simulation and animation of simple passive dynamic walking models

9 years ago | 4 downloads |

Submitted

hypergeomq
Fast evaluation of the generalized hypergeometric function

9 years ago | 3 downloads |

Answered
Symbolic math- substitute a derivative function with subs()?
A late answer, but maybe this will help others. See <http://stackoverflow.com/a/26998716/2278029 my answer here> on StackOverflo...

10 years ago | 2

Solved

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

11 years ago

Solved

Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

11 years ago

Solved

Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

11 years ago

Solved

The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

11 years ago

Solved

Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

11 years ago

Question

HARDCOPY slower with more figures open?
GETFRAME is slow. I'm using the HARDCOPY function as a faster alternative (it's still way too slow) in order to capture figures ...

12 years ago | 1 answer | 1

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answer

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Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

13 years ago

Andrew Horchler

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