In statistics, Ward's method is a criterion applied in hierarchical cluster analysis. Ward's minimum variance method is a special case of the objective function approach originally presented by Joe H. Ward, Jr. Ward suggested a general agglomerative hierarchical clustering procedure, where the criterion for choosing the pair of clusters to merge at each step is based on the optimal value of an objective function. This objective function could be "any function that reflects the investigator's purpose." Many of the standard clustering procedures are contained in this very general class. To illustrate the procedure, Ward used the example where the objective function is the error sum of squares, and this example is known as Ward's method or more precisely Ward's minimum variance method. The nearest-neighbor chain algorithm can be used to find the same clustering defined by Ward's method, in time proportional to the size of the input distance matrix and space linear in the number of points being clustered. (Wikipedia).
Power Method with Inverse & Rayleigh
Discussion of Eigenvalues & Eigenvectors, Power Method, Inverse Power Method, and the Rayleigh Quotient with brief overview of Rayleigh Quotient Iteration. Example code hosted on GitHub https://github.com/osveliz/numerical-veliz Chapters 0:00 Title Card 0:12 Terminology 0:37 Eigenvalue Ex
From playlist Numerical Methods
Labeling a System by Solving Using Elimination Method
👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves making the coefficient of one of the variables to be e
From playlist Solve a System of Equations Using Elimination | Medium
Solve a System of Equations Using Elimination
👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves making the coefficient of one of the variables to be e
From playlist Solve a System of Equations Using Elimination | Hard
matrix choose a matrix. Calculating the number of matrix combinations of a matrix, using techniques from linear algebra like diagonalization, eigenvalues, eigenvectors. Special appearance by simultaneous diagonalizability and commuting matrices. In the end, I mention the general case using
From playlist Eigenvalues
History of a Lost Supermaterial & How To Make It (Starlite Part 2)
In this video I explore the history of Starlite, homemade materials with similar properties, and commercial variants. Check out my sponsor Brilliant for a great way to learn math, science, and computer science: https://www.Brilliant.org/NightHawk There are many links below to references u
From playlist Re-Inventing Starlite
RailsConf 09: Robert Martin, "What Killed Smalltalk Could K
Robert Martin (Object Mentor, Inc.) "What Killed Smalltalk Could Kill Ruby, Too"
From playlist Rails - RailsConf, DHH, Getting Started, Installation
How to Solve a System of Equation Using Elimination
👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves making the coefficient of one of the variables to be e
From playlist Solve a System of Equations Using Elimination | Hard
Learn the Basics for Solving a System of Equations by Elimination
👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves making the coefficient of one of the variables to be e
From playlist Solve a System of Equations Using Elimination | Medium
The Expert Incentive, or ‘God Save the King of Kong'
On today's episode of Speaking of Bitcoin, correspondent George Frankly explores the expertise paradox through the lens of two very different historical figures. What do 18th century physician Ignaz Semmelweis and professional Donkey Kong player Billy J. Mitchell have in common? The exper
From playlist Podcast: Speaking of Bitcoin
Interdisciplinary Design for Services, Systems, and Beyond
(May 21, 2010) Jodi Forlizzi, Associate Professor of Design and Human-Computer Interaction at Carnegie Mellon University, discusses two insights that she has learned from bringing design to human computer interaction research and development. Professor Forlizzi uses examples from her work
From playlist Lecture Collection | Human-Computer Interaction Seminar (2009-2010)
Hierarchical Clustering 3: single-link vs. complete-link
[http://bit.ly/s-link] Agglomerative clustering needs a mechanism for measuring the distance between two clusters, and we have many different ways of measuring such a distance. We explain the similarities and differences between single-link, complete-link, average-link, centroid method and
From playlist Hierarchical Clustering
Using elimination to solve a system
👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves making the coefficient of one of the variables to be e
From playlist Solve a System of Equations Using Elimination | Medium
Markus Spitzweck: A Grothendieck Witt space for stable infinity categories with duality
The lecture was held within the framework of the (Junior) Hausdorff Trimester Program Topology: "Workshop: Hermitian K-theory and trace methods" In the talk we will construct a Grothendieck-Witt space for any stable infinity category with duality. We will show that if we apply our constru
From playlist HIM Lectures: Junior Trimester Program "Topology"
Rocky Mountain Ruby 2014 - The Technical Debt Trap by Doc Norton
Technical Debt has become a catch-all phrase for any code that needs to be re-worked. Much like Refactoring has become a catch-all phrase for any activity that involves changing code. These fundamental misunderstandings and comfortable yet mis-applied metaphors have resulted in a plethora
From playlist Rocky Mountain Ruby 2014
8. Nineteenth-Century Medicine: The Paris School of Medicine
Epidemics in Western Society Since 1600 (HIST 234) In the decades immediately following the French Revolution, Paris was at the center of a series of major developments in medical science, sometimes described as the transition from medieval to modern medicine. Although the innovations a
From playlist Epidemics in Western Society Since 1600 with Frank Snowden
Content Tree Word Embedding for document representation | AISC
Discussion Lead: Mehran Kamkarhaghighi Facilitators: Masoud Makrehchi For more details including paper and slides, visit https://aisc.a-i.science/events/2019-05-09/
From playlist Natural Language Processing
Graeffe's Root-Squaring Method (also called Graeffe-Dandelin-Lobachevskiĭ or Dandelin–Lobachesky–Graeffe method) for finding roots of polynomials. The method solves for all of the roots of a polynomial by only using the coefficients and does not require derivatives nor an interation funct
From playlist Root Finding
Ruby Midwest 2011 - Keynote: Architecture the Lost Years by Robert Martin
Robert C. Martin (Uncle Bob) has been a software professional since 1970. In the last 40 years, he has worked in various capacities on literally hundreds of software projects. He has authored "landmark" books on Agile Programming, Extreme Programming, UML, Object-Oriented Programming, C++
From playlist Ruby Midwest 2011
Solve a system of equation when they are the same line
👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves making the coefficient of one of the variables to be e
From playlist Solve a System of Equations Using Elimination | Medium