Box-cox transformation

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These are reminder notes about Box-cox transformation. One of the problems that box-cox transformation tries to solve is “heteroscedasticity” (non-constant variance). This article explains the problem where you can apply box-cox transformation to solve it: https://blog.minitab.com/en/applying-statistics-in-quality-projects/how-could-you-benefit-from-a-box-cox-transformation SciPy has added an inverse Box-Cox transformation: https://docs.scipy.org/doc/scipy/reference/generated/scipy.special.inv_boxcox.html Does Box-cox always work? The answer is NO. Box-cox does not … Read more

AWS CloudFront with W3 Total Cache

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I have been able to configure the CDN using this document: https://github.com/W3EDGE/w3-total-cache/wiki/FAQ:-CDN#how-do-i-configure-amazon-simple-storage-service-amazon-s3-or-amazon-cloudfront-as-my-cdn Basically you have to: 1.- Menu: Performance \ General Settings \ CDN –> Activate the CDN in the W3 Total Cache: 2.- In AWS go to : https://console.aws.amazon.com/iam/home#/security_credentials$access_key Create an “Access key”: 3.- Menu: Performance \ CDN —> enter the credentials, and then … Read more

Koncorde Big Players + DarkPool Index

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This code is an indicator composed by 2 pieces of code that have been combined. Big players by Konkorde that are buying (https://www.blai5.net/blai5-koncorde-la-importancia-del-volumen/) DarkPool Index when it’s over 35% (https://squeezemetrics.com/monitor/download/pdf/short_is_long.pdf?) The individual goal of these indicators is to point to big player buying. So what if we combine the 2 indicators? The code An example … Read more

SpaceX, Elon Musk and Wardley Maps

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I have seen these 3 videos of the Starbase tour with Elon Musk. Here video #1: https://youtu.be/t705r8ICkRw The reason was Pablo Bermejo pointed me to a specific sequence: this one in video #2, where he pointed to the PST model (Pioneer, Settlers and Town Planners model from gameplays proposed by Wardley Maps). So after watching … Read more

Time Series notes

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I have done this course proposed by Kaggle, and I would like to take some notes. The trend component of a time series represents a persistent, long-term change in the mean of the series. We mainly have: Time dependent properties: trends and seasonality. Serial dependent properties: Cycles and lagged series 1. Trends The trend component of a time series … Read more

Class ‘WooCommerce\PayPalCommerce\Compat\PPEC\DeactivateNote’ not found

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I have this error on my WordPress environment while I’m configuring paypal payments on the Woocommerce environment. The problem When i do a check out of a product and click on payment. Once the paypal credentials this error is shown: [INVALID_REQUEST] Request is not well-formed, syntactically incorrect, or violates schema. https://developer.paypal.com/docs/api/orders/v2/#error-INVALID_STRING_LENGTH Logs The Woocommerce log … Read more

Blue Ocean Strategy: bec/bum

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BEC / BUM are concepts extracted from the Blue Ocean Strategy: When should I use it? When you are thinking from a demand-side perspective and want to understand what potentially can come next. Simplified steps: If you are analyzing a competitor, to fulfill this table from its perspective can be also interesting to gain understanding … Read more

Cynefin principles

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The principles are the basis for everything, and Cynefin is not an exception. This is a summary of them: Principle 1: Embrace messy coherence The principle of messy coherence enables us to accommodate much diversity of approaches, methods and tools within Cynefin. Language is an excellent example of messy coherence, or in other worlds coherent … Read more