Love the program, butoptions> extents appears broken

wattsup · Post by **wattsup** » Sat Feb 16, 2008 9:39 am

Hello,

I've had a couple of versions now, currently have 2.1.5.6.

I plot a lot of temperature data, and I often want to change extents over what Dplot autoscales for. For example I have a simple dataset of annual temperatures:

"YEAR" "ANN"
1881 19.63
1882 20.68
1883 20.56
1884 19.63
1885 20.5
1886 20.55
1887 22.09
1888 20.47
1889 21.29
1890 20.48
1891 20.28
1892 20.29
1893 20.72
1894 20.23
1895 21.09
1896 20.83
1897 20.49
1898 20.81
1899 20.58
1900 21.33
1901 21.36
1902 21.14
1903 20.73
1904 21.18
1905 20.81
1906 20.57
1907 20.82
1908 20.44
1909 20.53
1910 21.47
1911 20.74
1912 19.82
1913 19.79
1914 21.45
1915 20.17
1916 20.54
1917 19.92
1918 20.69
1919 20.15
1920 20.57
1921 21.06
1922 20.65
1923 20.61
1924 21.35
1925 21.62
1926 21.59
1927 21.36
1928 21.63
1929 21.13
1930 21.6
1931 22.17
1932 21.53
1933 21.33
1934 23.15
1935 21.56
1936 22.63
1937 21.43
1938 21.57
1939 21.66
1940 22.6
1941 20.96
1942 21.4
1943 22.3
1944 20.76
1945 21.14
1946 21.19
1947 22.02
1948 21.15
1949 21.08
1950 22.16
1951 21.47
1952 21.41
1953 21.14
1954 22.1
1955 20.77
1956 21.13
1957 21.43
1958 22.59
1959 22.35
1960 21.85
1961 21.17
1962 21.33
1963 21.8
1964 19.91
1965 20.23
1966 21.44
1967 21.34
1968 21.21
1969 21.59
1970 22.03
1971 21.52
1972 22.42
1973 22.08
1974 23.08
1975 21.49
1976 22.65
1977 23.61
1978 23.52
1979 22.28
1980 23.14
1981 24.51
1982 23.33
1983 23.27
1984 23.56
1985 23.23
1986 23.79
1987 23.74
1988 23.83
1989 24.45
1990 23.71
1991 23.66
1992 24.18
1993 23.48
1994 23.24
1995 23.46
1996 24.03
1997 23.98
1998 22.48
1999 23.48
2000 23.69
2001 24.53
2002 24.35
2003 24.58
2004 23.95
2005 24.18
2006 24.31
2007 24.73

Now when I bring them in as a CSV, Dplot will correctly plot them OK, but when I go to change the extents so that the top of the Y scale is at 25.5 and the bottom is at 18.5, what I end up with is a range of 25.6 to 18.4 with tick marks at even number values like 19.2, 20.8 etc.

This happened on previous versions with other data sets as well. It's not a killer, but pretty darned annoying since I can't get the scaling I want out of it on regular boundaries. I can't blame "global warming" for this one.

Otherwise a great program,

happy with it and beats using Excel 10 to 1

Can you fix this?

Post by **DPlotAdmin** » Sat Feb 16, 2008 12:40 pm

Thanks for your comments. "Specify extents" works better with some number formats than others, but in all cases you're only guaranteed to get the extents you want if you also check "Specify interval" and the extents are a multiple of the interval. (In your case 0.5 for the Y interval would work well.)

This admittedly needs work.