Question

THis is r。

The data (uspop) gives the decade-by-decade population of the United States (in millions) as recorded by the decennial census for the period 1790–1970. Load the data.

1. Use names() and seq() to add the years 1790 – 1970 to the data vector.

2. Obtain the inter-decade differences. Which decade had the largest increase in US population?

Answer 1

Population = uspop years = seq(1790, 1970, 10) d = data.frame (years, population) d years population 1 1790 3.93 2 1800 5.31 3 1810 7.24 4 1820 9.64 5 1830 12.90 6 1840 17.10 7 1850 23.20 8 1860 31.40 9 1870 39.80 10 1880 50.20 11 1890 62.90 12 1900 76.00 13 1910 92.00 14 1920 105.70 15 1930 122.80 16 1940 131.70 17 1950 151.30 18 1960 179.30 19 1970 203.20 for (i in 1;nrow (d)) + { + diff = d[, 2] [i] - d[,2] [I - 1] + print(diff) + } numeric (0) [1] 1.38 [1] 1.93 [1] 2.4 [1] 3.26 [1] 4.2 [1] 6.1 [1] 8.2 [1] 10.4 [1] 12.7 [1] 13.1 [1] 16 [1] 13.7 [1] 17.1 [1] 8.9 [1] 19.6 [1] 28 [1] 23.9 Using diff we can see that 1960 decade had the largest population increase in US

Using diff we can see that 1960 decade had the largest population increase in US