Chris Mendez (Page 1)

Statistics: Calculating Mean, Median, Mode, Standard Deviation using Ruby, R, or Javascript

Statistics: Calculating Mean, Median, Mode, Standard Deviation using Ruby, R, or Javascript

Unsure what is mean median and mode? Here's how to find mean, median, mode and standard deviation using Ruby, R, and Javascript.

Interesting Music Projects

Here are a list of interesting music projects. Classifiers and Curators * Music Map [https://developers.musimap.net/] is attempting to create a database that organizes music into emotional categories. Geocaching * Track Dropper [https://vimeo.com/14712960] is a geo caching game that is really novel. Social Listening * &chill [https://andchill.

Wrangling Javascript DataFrames using Data-Forge

Wrangling Javascript DataFrames using Data-Forge

How to use Data-Forge to help you easily itemize your expenses.

Finance: Calculating Annuities using ES6

Annuities are cool. They're fixed payments over a period of time. If you're living in England, there's another financial product called a consol that is an annuity that pays out in perpetuity. Amazing. Below are simplified examples of how to calculate present value and future value for annuities. I wasn't

Moodles Real-time MIDI Composer Deep Dive

Moodles, a first-of-its-kind musical instrument app for kids to compose music without the banality of classes. Built using Swift, AudioKit, and Firebase.

What is ISRC?

ISRC stands for International Standard Recording Code [https://en.wikipedia.org/wiki/International_Standard_Recording_Code] is pretty much like the audio equivalent of a GS1 US [https://www.gs1us.org/] for barcodes and product identification. According to GS1 US: > GS1 standards allow you to easily identify, manage, and share

Statistics: Calculating Probabilities using ES6

Suppose you wanted to calculate the percentage of men that weigh inbetween 140 and 170 lbs. This is possible if you carry a few data points such as the average weight of men (mean), the standard deviation, and the specific weight you want to measure (data point). Step 0 -

Finance: College Fund and Loan Amount Estimator using Es6

Similar to my previous article, here are some formulas that can help you estimate how much you need to save for your kid's college tuition or what your monthly mortgage payment will look like if you buy that house. Loans class Loan { payments(PV, IR, NP){ var PMT = (PV * IR)

AWS Elemental

Amazon acquired a company called Elemental [https://techcrunch.com/2015/09/03/amazon-acquires-elemental-technologies-for-a-reported-500-million-in-cash/] back in 2015 and has now released a suite of products to help broadcasters (big and small) distribute and syndicate video online. Think of Elemental as Amazon's in-house solution to Adobe's defunct Flash Media Server [https://aws.

Create a Base64 image in one click

Create a Base64 image in one click

I recently discovered this incredible tool from Arbitrary.io [http://arbitrary.io] to help you instantly encode images to Data URI's. If you ever need to encode an image, an SVG or a file, all you have to do is right-click it and you're done. Why Data URI's? So far,

How to record which users are leaving your site on Google Analytics

As a website (or app manager), I oftentimes ask myself this question, "How many users are we sending to our external partner sites? Also, how many are we sending on a monthly basis?" Google Tag Manager [http://www.amazeemetrics.com/en/blog/google-tag-manager-tutorial-part-1-tracking-outbound-links-gtm-version-2] can certainly help you answer this question

How Classical KUSC uses data to make product decisions

The digital team at Classical KUSC [http://www.kusc.org] and Classical KDFC [http://www.kdfc.com] uses data regularly to help make product decisions. For our most recent app release, Classical KUSC iOS v5.0 [http://geni.us/kuscios], we used a combination of in-app surveys, customer support feedback

Digital music: production, distribution, and consumption

I like this quote because it helps me understand the trade-off music will experience as it transitions from an analog medium to a digital one. > It could be argued, then, that as the formats music is stored on become less material and increasingly stripped of visual dimensions (album covers, reproduction

Cloud computing & song scrobbling on Last.fm

I'm extremely late to this whole Last.fm thing, but then again, I'm not sure if I've missed much. From what I can tell, Last.fm is a music discovery site that collects and maintains your "musical foot stream" while allowing you to share your information with the community. The

Decentralized Autonomous Organization (DAO): What's Next? A Look at

Decentralized Autonomous Organization (DAO): What's Next? A Look at

What is a DAO, and why is it a key pillar in the current crypto/web3 movement. If you're an investor, read. If you're an entrepreneur, read.

11 Proven Ways To Get Along Better With EVERYONE

11 Proven Ways To Get Along Better With EVERYONE

11 proven ways to get along with everyone.

Your First 30 Days

Your First 30 Days

How to think about impact your first 30 days in a new job.

Load Testing Deep Dive

Load Testing Deep Dive

How engineers can stress test apps, new features, or experiments prior to production launch.

Hello FinTech!

Finance textbooks are often too academic or dense to be useful. Here are a few key finance terms explained in "plain English".

R: Samples and Populations

R: Samples and Populations

This article aims to show you how to either create a random population or import a dataset then take a random sample using R. What is a Sample? So when you have a population of something, you'll start to notice that the population has certain characteristics. The characteristics (or parameters)

Finance: Calculating Present and Future Value using ES6

How to calculate Present and Future value using ES6.

Google Tag Manager Tips and Tricks

Recipes on tracking user behavior through Google Tag Manager.

What is Big Data?

What is Big Data?

A few basic questions and answers on big data from a software engineer and product manager.

Calculating startup value

How to calculate sweat equity amongst co-founders in a clean and simple way.

Sources of inspiration for developers

If you area a software developer looking for your next gig, here area few sources for inspiration. I've organized this list into two main categories: paid and unpaid. The thinking behind this is that some developers would prefer to get paid while they learn about a particular technology or industry,