make sure you don’t fall into the trap of copying pointers in Python: import numpy as np a = np.zeros(2) print(“a = “, a) b = np.zeros(2) print(“b = “, b) b = a # this assignment is simply a pointer copy – b points to the same data pointed to by a a[0]=33.33 # …
Author: Tony Saad
How to Highlight Code in Keynote
First install a utility called highlight. It is available through macports and homebrew. sudo port install highlight Now that highlight is installed, you can “apply” it to a file and pipe it to the clipboard: highlight -O rtf MyCode.cpp | pbcopy Now go to Kenote and simply paste from clipboard (or command + v). Highlight …
C++ – Calling Overloaded Operator () from Pointer
Here are three ways to call a C++ classes’ operator () using a pointer: Say you have a C++ class name MyClass that overloads the operator “()”, something along the lines: I use method 2.
Add to Calendar for Google Inbox
For those who have adopted inbox for their workflow, here’s how to add an event to your calendar. Your must be using google calendar & Chrom Download the google calendar extension and add it to Chrome. You will need to authorize your calendar. Back to inbox, select the text corresponding to your event (e.g. Thursday February 2, …
Convert Movie or Animation to Animated Gif
mkdir frames ffmpeg -i input -vf scale=320:-1:flags=lanczos,fps=10 frames/ffout%03d.png convert -loop 0 frames/ffout*.png -fuzz 20% -layers OptimizePlus output.gif Thanks to: http://superuser.com/questions/556029/how-do-i-convert-a-video-to-gif-using-ffmpeg-with-reasonable-quality
Unbounded Kinetic Energy in Forward-Euler Inviscid Flows
Observation When using a forward-Euler method for the time integration of the momentum equation for an inviscid-flow, it appears that the kinetic energy of the flow grows unbounded in time, regardless of the timestep size. Problem Statement Estimate the change in total kinetic energy when using forward-Euler to integrate the Euler momentum equations in a periodic box. Approach To …
List and Sort Files by Size
Find and sort all files > 1Mb in size, in current directory and subdirectories find . -size +1M -exec du -h {} \; | sort -nr
Some Regex Notes
I happened to be dealing with a bunch of mallocs that look like this double* f = (double*)malloc(sizeof(double)*nx*ny*nz); double* g = (double*)malloc(sizeof(double)*nx); double* h = (double*)malloc(sizeof(double)*nx*nz); I wanted to convert all of those those to use new, i.e. double* f = new double[nx*ny*nz] Using regex made all this possible search for: \(double\*\)malloc\(sizeof\(double\)\*(.*)\) replace with: new …
A Note on the Vector Form of the Navier-Stokes Equations
Here’s how I mix vector and tensor notation to avoid diadics in the Navier-Stokes equations
How to Sync Zotero with a Box Sync Enterprise Account
So the University of Utah provides us with 50 GB of storage with Box Sync. Box Sync supports webdav natively. On another note I use Zotero for my citation management. The great thing about Zotero is that it allows your to store your library on your own webdav. Combining the above I am able to …
Waikiki Beach Panorama
Diamond Head Volcano Panorama
Canyon Lands Panorama
Poster Presented at PSAAPII TST Site Review
Tony Saad, Christopher Earl, Abhishek Bagusetty, Matthew Might, and James C. Sutherland, Architecture-Proof Multiphysics using a Domain Specific Language, Presented at the TST Site Review of the Utah PSAPPII Center, Salt Lake City, Utah, April 2015.
Poster Presented at SIAM CSE2015 Conference!
Tony Saad, Abhishek Bagusetty, and James C. Sutherland, Wasatch: A CPU/GPU-Ready Multiphysics Code Using a Domain Specific Language, University of Utah, USA