[R] group data in classes

[Rolf Turner]

brs <- seq(1590,2000,by=10)
lbs <- paste(brs[-length(brs)],brs[-1],sep="-")
y <- cut(x,breaks=brs,labels=lbs) # Where "x" is your data vector.
grpd <- data.frame(year=x,decade=y)
head(grpd)
>   year    decade
> 1 1598 1590-1600
> 2 1599 1590-1600
> 3 1600 1590-1600
> 4 1601 1600-1610
> 5 1602 1600-1610
> 6 1603 1600-1610

OK?

     cheers,

         Rolf Turner

P.S. In future please provide your data using dput() to make
it easier for helpers to read it in.

         R. T.

On 04/07/2013 07:47 PM, catalin roibu wrote:
> Hello all!
> I have a problem to group my data (years) in 10 years classes. For example
> for year
>
> year     decade
> 1598  1590-1600
> 1599  1590-1600
> 1600  1590-1600
> 1601  1600-1610
> ---
>
> my is like this>
>
>   [1] 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611
> 1612
>   [16] 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626
> 1627
>   [31] 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641
> 1642
>   [46] 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656
> 1657
>   [61] 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671
> 1672
>   [76] 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686
> 1687
>   [91] 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701
> 1702
> [106] 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
> 1717
> [121] 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731
> 1732
> [136] 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
> 1747
> [151] 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761
> 1762
> [166] 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776
> 1777
> [181] 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791
> 1792
> [196] 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
> 1807
> [211] 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821
> 1822
> [226] 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
> 1837
> [241] 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851
> 1852
> [256] 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866
> 1867
> [271] 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881
> 1882
> [286] 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896
> 1897
> [301] 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911
> 1912
> [316] 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926
> 1927
> [331] 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941
> 1942
> [346] 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956
> 1957
> [361] 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971
> 1972
> [376] 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986
> 1987
> [391] 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
>
> Thank you!