333 search results for "iris"

MinechaRts #1 (Minecraft + R + Edgar Anderson’s Iris Data)

September 5, 2016
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MinechaRts #1 (Minecraft + R + Edgar Anderson’s Iris Data)

How to use R to draw 3D scatterplots in Minecraft? Let’s see. Minecraft is a game about placing blocks and going on adventures (source). Blocks are usually placed by players but there are add-ons that allow to add/modify/remove blocks through external API. And this feature is being used in educational materials that show how to … Czytaj...

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Using Support Vector Machines as Flower Finders: Name that Iris!

May 25, 2016
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Using Support Vector Machines as Flower Finders: Name that Iris!

Nature field guides are filled with pictures of plants and animals that teach us what to look for and how to name what we see. For example, a flower finder might display pictures of different iris species, such as the illustrations in the plot below. Y...

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Model building with the iris data set for Big Data

August 14, 2014
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Model building with the iris data set for Big Data

by Joseph Rickert I think we can be sure that when American botanist Edgar Anderson meticulously collected data on three species of iris in the early 1930s he had no idea that these data would produce a computational storm that would persist well into the 21st century. The calculations started, presumably by hand, when R. A. Fisher selected this...

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Discriminating Between Iris Species

August 4, 2012
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Discriminating Between Iris Species

The Iris data set is a famous for its use to compare unsupervised classifiers. The goal is to use information about flower characteristics to accurately classify the 3 species of Iris. We can look at scatter plots of the 4 variables in the data set and see that no single variable nor bivariate combination can achieve this. One approach to improve the separation

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IRIS Flower Data Set (R-003)

December 19, 2011
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IRIS Flower Data Set (R-003)

Centramos la matriz con el comando, generando a partir de A una nueva matriz que llamamos "Acentered"Acentered=scale(A,center=T)Ahora con la función "eigen":Esta es otra forma de proceder con el cálculo de los componentes principales (eigenvectors y ...

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IRIS Flower Data Set (R-002)

December 17, 2011
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IRIS Flower Data Set (R-002)

Ver  primero: IRIS Flower Data Set (R-001)See first:        IRIS Flower Data Set (R-001)El comando "summary" nos ayuda a comprender la importancia de cada componente principal:Los "eigenvalues" son las desviacion...

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IRIS Flower Data Set (R-001)

December 17, 2011
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IRIS Flower Data Set (R-001)

IRIS Flower Data SetEste es el Link a Wikipedia donde podéis encontrar los datos que utilizó Fisher en su trabajo de 1936. Ya hemos trabajado con estos datos en Excel y los continuaremos usando en nuevas entradas.En este link, podemos ver las fotos de las flores (IRIS en castellano son lírios).Represento como LS (longitud del sépalo), AS...

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Cointegration, R, Irish Mortgage Debt and Property Prices

May 15, 2011
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Cointegration, R, Irish Mortgage Debt and Property Prices

As a follow-up to my post examining the stationarity of the new property price index, this post will briefly look at some of the dynamics of mortgage debt and property prices; all data is monthly, from the beginning of 2005 to March 2011. This will also serve as an illustration of the ‘vars‘ and ‘urca‘

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The New Irish House Price Index

May 14, 2011
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The New Irish House Price Index

On Friday, the CSO released a new house (and apartment) price index, for the national, Dublin, and national excluding Dublin regions. The release has been noted and covered by the great Irish Economy and Namawinelake blogs. I want to briefly look at some of the statistical properties of this series in more detail. Below is

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Potential Output and the Irish Output Gap

May 14, 2011
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Potential Output and the Irish Output Gap

One prominent feature of early degree-level macroeconomics courses is the concept of ‘potential output’, which one could roughly define as the level of output (GDP) at which inflation is not ‘accelerating’. Potential output is of interest to macroeconomists when analysing the question of output gaps and macroeconomic stabilisation policies by governments, whether that be in

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