A user has data of stock prices of weekdays of two companies GOogle and Microsoft.Now he wants to build a matrix by giving dimension of weekdays names and the company names.How to do that?

Answered by David WHITE

Let us assign all the stock prices to a vector

goog <- c(450,451,452,445,468)

msft <- c(230,231,232,236,228)

Now let us build a matrix

stocks <- c(goog,msft)

stock.matrix <- matrix(stocks,byrow=TRUE,nrow=2)

Now let us name the dimension

days <- c('Mon','Tue','Wed','Thu','Fri')

st.names <- c('GOOG','MSFT')

colnames(stock.matrix) <- days

rownames(stock.matrix) <- st.names

Now finally let us display the matrix

Stock.matrix

We get the following matrix

Mon Tue Wed Thu Fri

GOOG 450 451 452 445 468

MSFT 230 231 232 236 228

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