Posts Tagged ‘ principal components ’

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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Augmented support for complex survey designs in R

March 3, 2010
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Augmented support for complex survey designs in R

We'll get back to code examples later this week, but wanted to let you know about an R package with updated functionality in the meantime.The appropriate analysis of sample surveys requires incorporation of complex design features, including stratification, clustering, weights, and finite population correction. These can be address in SAS and R for many common models. Section...

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