grochmal.org valuation and analysis
Robots.txt Information
| Robot | Path | Permission |
| GoogleBot | / | ✔ |
| BingBot | / | ✔ |
| BaiduSpider | / | ✔ |
| YandexBot | / | ✔ |
# robots.txt for grochmal.org and friends # wget without --wait can go bonkers User-agent: wget Disallow: / # old problematic bot User-agent: WebReaper Disallow: / # these would be problematic if were crawled User-agent: * Disallow: /.well-known/ Disallow: /.error-pages/ Disallow: /jupyter/ Disallow: /public/ Disallow: /data-api/ Disallow: /user-api/ Disallow: /search Crawl-delay: | ||
Meta Tags
| Title | Coding and |
| Description | grochmal.org - Ancillary Coding and Math grochmal.org - Ancillary Coding and Math Support Math Unix Hack Other About Mathematics ¶ PCA from Scratch Principal Component Analysis (PCA) is a techniq |
| Keywords | N/A |
Server Information
| WebSite | |
| Host IP | 85.159.215.195 |
| Location | United Kingdom |
Related Websites
| Site | Rank |
More to Explore
grochmal.org Valuation
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US$324,355
Last updated: 2023-05-17 06:46:07
grochmal.org has Semrush global rank of 32,631,909. grochmal.org has an estimated worth of US$ 324,355, based on its estimated Ads revenue. grochmal.org receives approximately 37,426 unique visitors each day. Its web server is located in United Kingdom, with IP address 85.159.215.195. According to SiteAdvisor, grochmal.org is safe to visit. |
Traffic & Worth Estimates
| Purchase/Sale Value | US$324,355 |
| Daily Ads Revenue | US$300 |
| Monthly Ads Revenue | US$8,983 |
| Yearly Ads Revenue | US$107,786 |
| Daily Unique Visitors | 2,496 |
| Note: All traffic and earnings values are estimates. | |
DNS Records
| Host | Type | TTL | Data |
| grochmal.org. | A | 7199 | IP: 85.159.215.195 |
| grochmal.org. | NS | 10800 | NS Record: rush.easydns.com. |
| grochmal.org. | NS | 10800 | NS Record: nirvana.easydns.net. |
| grochmal.org. | NS | 10800 | NS Record: motorhead.easydns.org. |
| grochmal.org. | MX | 10800 | MX Record: 0 mx-caprica.easydns.com. |
HtmlToTextCheckTime:2023-05-17 06:46:07
| grochmal.org - Ancillary Coding and Math Support Math Unix Hack Other About Mathematics ¶ PCA from Scratch Principal Component Analysis (PCA) is a technique for linear data visualization and general dimensionality reduction. The technique is based on decomposition into eigenvectors and eigenvalues. Eigenvectors and eigenvalues can be explained and exemplified with reasonable ease. Yet, to calculate them from a matrix can be quite tricky. Sample Bias Derivation Statistics over a population are well defined but when all the data we have is a collected sample of the population we need to account for issues with the collection of the sample. The simplest correction is to subtract one from the number of data points when calculating the statistics. That "minus one" seem quite arbitrary at first but there is a lot more theory behind that value than it first appears. Least Squares Derivation Least Squares is quite and old technique, likely the eighteen century or even as early as Newton, but |
HTTP Headers
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grochmal.org Whois Information
Domain Name: GROCHMAL.ORG Registry Domain ID: D171950144-LROR Registrar WHOIS Server: whois.easydns.com Registrar URL: http://www.easydns.com Updated Date: 2020-05-12T01:28:23Z Creation Date: 2014-04-14T21:34:55Z Registry Expiry Date: 2026-04-14T21:34:55Z Registrar: easyDNS Technologies Inc. Registrar IANA ID: 469 Registrar Abuse Contact Email: abuse@easydns.com Registrar Abuse Contact Phone: +1.4165358672 Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited Registrant Organization: Data Protected Registrant State/Province: ON Registrant Country: CA Name Server: NIRVANA.EASYDNS.NET Name Server: RUSH.EASYDNS.COM Name Server: MOTORHEAD.EASYDNS.ORG DNSSEC: unsigned URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/) >>> Last update of WHOIS database: 2022-03-10T10:47:46Z <<< |