5 Doing Math
A <- matrix(1:100, nrow=10) > B <- matrix(1:1000, nrow=10) > det(A) [1] 0 > det(B) Error in determinant.matrix(x, logarithm = TRUE, ...) : 'x' must be a square matrix | |
Visualization in R
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Basic Graph Romar Wallen For my module 8 visualization I chose the Dow Jones stock market file since I have very little knowledge of it and I'd like to see what the value are and how the values are affected by time. I used this command, DJFranses <- DJFranses[, -1], to remove the first and additional column. This will remove a third element that can issues when running the command for the 2-D graph. running the code below creates a basic visualization of the DJFranses stock market over the 15 year period. plot (DJFranses$time, DJFranses$value, cex = 3, pch = 20, main = "Dow index time series data", xlab="Time", ylab = "Stock Value") Lattice after loading the library(lattice) into the interface I was able to pl...
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