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Various matrix manipulations
#R version 3.3.2 print("Hello, world!") ligne1<-c(1,5,5,0) ligne2<-c(0,5,6,1) ligne3<-c(3,0,3,3) ligne4<-c(4,4,4,2) mat<-matrix(c(ligne1, ligne2, ligne3, ligne4), nrow=4, ncol=4, byrow=TRUE, dimnames=list(c("Ligne 1", "Ligne 2", "Ligne 3", "Ligne 4"), c("Colonne 1", "Colonne 2", "Colonne 3", "Colonne 4"))) mat vdiag<-diag(mat) vdiag v2FirstRows<-mat[1:2, ] v2FirstRows v2LastCols<-mat[ , 3:4] v2LastCols vButThirdCol<-mat[ ,-3] vButThirdCol matInverse<-solve(mat) matInverse matDeterm<-det(mat) matDeterm
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