File:Reg ls dgr resid x.svg

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Original file ‎(SVG file, nominally 630 × 630 pixels, file size: 47 KB)

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Description
Català: Digrama de dispersió dels residuals contra els valors observats de la variable independent
Date
Source Own work
Author Pep Roca

Exemple tret del curs Regression Models de Brian Caffo et al [1] consultat 29-06-2014

 
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R source code

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set.seed(123)                          # El fixa la llavor per generar nombres aleatoris                
X = runif(100, -3, 3)                  # Valor de la variable independent
Y = X + sin(X) + rnorm(100, sd = 0.2)  # Valor de la variable depenent
svg("gra/reg_ls_dgr_resid_x.svg")      # Desar el diagrama en un fitxer tipus svg
plot(resid(lm(Y ~ X)) ~ X)             # Diagrama de dispersió dels residuals sobre les X
abline(h = 0)                          # S'afegeix una línia horitzontal a Y = 0  
dev.off()                              # Tancar i desar el diagrama

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Date/TimeThumbnailDimensionsUserComment
current18:29, 29 June 2014Thumbnail for version as of 18:29, 29 June 2014630 × 630 (47 KB)Pep Roca (talk | contribs)User created page with UploadWizard

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