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Limite de temps dans le jeu de données

2017-08-23 2 views
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J'utilise Iris et Matplotlib pour comparer visuellement deux ensembles de données (cartes, graphiques linéaires, etc.). Les deux ensembles de données contiennent des données sur l'heure, la latitude, la longitude et la température. Cependant, les deux ensembles de données ont des séries temporelles différentes (une de 1901 à 2007 et une de 1950 à 2005). Comment puis-je limiter les jeux de données afin que je puisse comparer en termes de temps? Les données de temps sont dans ce format:Limite de temps dans le jeu de données

DimCoord([1950-01-16 12:00:00, 1950-02-15 00:00:00, 1950-03-16 12:00:00, 
     1950-04-16 00:00:00, 1950-05-16 12:00:00, 1950-06-16 00:00:00, 
     1950-07-16 12:00:00, 1950-08-16 12:00:00, 1950-09-16 00:00:00, 
     1950-10-16 12:00:00, 1950-11-16 00:00:00, 1950-12-16 12:00:00, 
     1951-01-16 12:00:00, 1951-02-15 00:00:00, 1951-03-16 12:00:00, 
     1951-04-16 00:00:00, 1951-05-16 12:00:00, 1951-06-16 00:00:00, 
     1951-07-16 12:00:00, 1951-08-16 12:00:00, 1951-09-16 00:00:00, 
     1951-10-16 12:00:00, 1951-11-16 00:00:00, 1951-12-16 12:00:00, 
     1952-01-16 12:00:00, 1952-02-15 00:00:00, 1952-03-16 12:00:00, 
     1952-04-16 00:00:00, 1952-05-16 12:00:00, 1952-06-16 00:00:00, 
     1952-07-16 12:00:00, 1952-08-16 12:00:00, 1952-09-16 00:00:00, 
     1952-10-16 12:00:00, 1952-11-16 00:00:00, 1952-12-16 12:00:00, 
     1953-01-16 12:00:00, 1953-02-15 00:00:00, 1953-03-16 12:00:00, 
     1953-04-16 00:00:00, 1953-05-16 12:00:00, 1953-06-16 00:00:00, 
     1953-07-16 12:00:00, 1953-08-16 12:00:00, 1953-09-16 00:00:00, 
     1953-10-16 12:00:00, 1953-11-16 00:00:00, 1953-12-16 12:00:00, 
     1954-01-16 12:00:00, 1954-02-15 00:00:00, 1954-03-16 12:00:00, 
     1954-04-16 00:00:00, 1954-05-16 12:00:00, 1954-06-16 00:00:00, 
     1954-07-16 12:00:00, 1954-08-16 12:00:00, 1954-09-16 00:00:00, 
     1954-10-16 12:00:00, 1954-11-16 00:00:00, 1954-12-16 12:00:00, 
     1955-01-16 12:00:00, 1955-02-15 00:00:00, 1955-03-16 12:00:00, 
     1955-04-16 00:00:00, 1955-05-16 12:00:00, 1955-06-16 00:00:00, 
     1955-07-16 12:00:00, 1955-08-16 12:00:00, 1955-09-16 00:00:00, 
     1955-10-16 12:00:00, 1955-11-16 00:00:00, 1955-12-16 12:00:00, 
     1956-01-16 12:00:00, 1956-02-15 00:00:00, 1956-03-16 12:00:00, 
     1956-04-16 00:00:00, 1956-05-16 12:00:00, 1956-06-16 00:00:00, 
     1956-07-16 12:00:00, 1956-08-16 12:00:00, 1956-09-16 00:00:00, 
     1956-10-16 12:00:00, 1956-11-16 00:00:00, 1956-12-16 12:00:00, 
     1957-01-16 12:00:00, 1957-02-15 00:00:00, 1957-03-16 12:00:00, 
     1957-04-16 00:00:00, 1957-05-16 12:00:00, 1957-06-16 00:00:00, 
     1957-07-16 12:00:00, 1957-08-16 12:00:00, 1957-09-16 00:00:00, 
     1957-10-16 12:00:00, 1957-11-16 00:00:00, 1957-12-16 12:00:00, 
     1958-01-16 12:00:00, 1958-02-15 00:00:00, 1958-03-16 12:00:00, 
     1958-04-16 00:00:00, 1958-05-16 12:00:00, 1958-06-16 00:00:00, 
     1958-07-16 12:00:00, 1958-08-16 12:00:00, 1958-09-16 00:00:00, 
     1958-10-16 12:00:00, 1958-11-16 00:00:00, 1958-12-16 12:00:00, 
     1959-01-16 12:00:00, 1959-02-15 00:00:00, 1959-03-16 12:00:00, 
     1959-04-16 00:00:00, 1959-05-16 12:00:00, 1959-06-16 00:00:00, 
     1959-07-16 12:00:00, 1959-08-16 12:00:00, 1959-09-16 00:00:00, 
     1959-10-16 12:00:00, 1959-11-16 00:00:00, 1959-12-16 12:00:00, 
     1960-01-16 12:00:00, 1960-02-15 00:00:00, 1960-03-16 12:00:00, 
     1960-04-16 00:00:00, 1960-05-16 12:00:00, 1960-06-16 00:00:00, 
     1960-07-16 12:00:00, 1960-08-16 12:00:00, 1960-09-16 00:00:00, 
     1960-10-16 12:00:00, 1960-11-16 00:00:00, 1960-12-16 12:00:00, 
     1961-01-16 12:00:00, 1961-02-15 00:00:00, 1961-03-16 12:00:00, 
     1961-04-16 00:00:00, 1961-05-16 12:00:00, 1961-06-16 00:00:00, 
     1961-07-16 12:00:00, 1961-08-16 12:00:00, 1961-09-16 00:00:00, 
     1961-10-16 12:00:00, 1961-11-16 00:00:00, 1961-12-16 12:00:00, 
     1962-01-16 12:00:00, 1962-02-15 00:00:00, 1962-03-16 12:00:00, 
     1962-04-16 00:00:00, 1962-05-16 12:00:00, 1962-06-16 00:00:00, 
     1962-07-16 12:00:00, 1962-08-16 12:00:00, 1962-09-16 00:00:00, 
     1962-10-16 12:00:00, 1962-11-16 00:00:00, 1962-12-16 12:00:00, 
     1963-01-16 12:00:00, 1963-02-15 00:00:00, 1963-03-16 12:00:00, 
     1963-04-16 00:00:00, 1963-05-16 12:00:00, 1963-06-16 00:00:00, 
     1963-07-16 12:00:00, 1963-08-16 12:00:00, 1963-09-16 00:00:00, 
     1963-10-16 12:00:00, 1963-11-16 00:00:00, 1963-12-16 12:00:00, 
     1964-01-16 12:00:00, 1964-02-15 00:00:00, 1964-03-16 12:00:00, 
     1964-04-16 00:00:00, 1964-05-16 12:00:00, 1964-06-16 00:00:00, 
     1964-07-16 12:00:00, 1964-08-16 12:00:00, 1964-09-16 00:00:00, 
     1964-10-16 12:00:00, 1964-11-16 00:00:00, 1964-12-16 12:00:00, 
     1965-01-16 12:00:00, 1965-02-15 00:00:00, 1965-03-16 12:00:00, 
     1965-04-16 00:00:00, 1965-05-16 12:00:00, 1965-06-16 00:00:00, 
     1965-07-16 12:00:00, 1965-08-16 12:00:00, 1965-09-16 00:00:00, 
     1965-10-16 12:00:00, 1965-11-16 00:00:00, 1965-12-16 12:00:00, 
     1966-01-16 12:00:00, 1966-02-15 00:00:00, 1966-03-16 12:00:00, 
     1966-04-16 00:00:00, 1966-05-16 12:00:00, 1966-06-16 00:00:00, 
     1966-07-16 12:00:00, 1966-08-16 12:00:00, 1966-09-16 00:00:00, 
     1966-10-16 12:00:00, 1966-11-16 00:00:00, 1966-12-16 12:00:00, 
     1967-01-16 12:00:00, 1967-02-15 00:00:00, 1967-03-16 12:00:00, 
     1967-04-16 00:00:00, 1967-05-16 12:00:00, 1967-06-16 00:00:00, 
     1967-07-16 12:00:00, 1967-08-16 12:00:00, 1967-09-16 00:00:00, 
     1967-10-16 12:00:00, 1967-11-16 00:00:00, 1967-12-16 12:00:00, 
     1968-01-16 12:00:00, 1968-02-15 00:00:00, 1968-03-16 12:00:00, 
     1968-04-16 00:00:00, 1968-05-16 12:00:00, 1968-06-16 00:00:00, 
     1968-07-16 12:00:00, 1968-08-16 12:00:00, 1968-09-16 00:00:00, 
     1968-10-16 12:00:00, 1968-11-16 00:00:00, 1968-12-16 12:00:00, 
     1969-01-16 12:00:00, 1969-02-15 00:00:00, 1969-03-16 12:00:00, 
     1969-04-16 00:00:00, 1969-05-16 12:00:00, 1969-06-16 00:00:00, 
     1969-07-16 12:00:00, 1969-08-16 12:00:00, 1969-09-16 00:00:00, 
     1969-10-16 12:00:00, 1969-11-16 00:00:00, 1969-12-16 12:00:00, 
     1970-01-16 12:00:00, 1970-02-15 00:00:00, 1970-03-16 12:00:00, 
     1970-04-16 00:00:00, 1970-05-16 12:00:00, 1970-06-16 00:00:00, 
     1970-07-16 12:00:00, 1970-08-16 12:00:00, 1970-09-16 00:00:00, 
     1970-10-16 12:00:00, 1970-11-16 00:00:00, 1970-12-16 12:00:00, 
     1971-01-16 12:00:00, 1971-02-15 00:00:00, 1971-03-16 12:00:00, 
     1971-04-16 00:00:00, 1971-05-16 12:00:00, 1971-06-16 00:00:00, 
     1971-07-16 12:00:00, 1971-08-16 12:00:00, 1971-09-16 00:00:00, 
     1971-10-16 12:00:00, 1971-11-16 00:00:00, 1971-12-16 12:00:00, 
     1972-01-16 12:00:00, 1972-02-15 00:00:00, 1972-03-16 12:00:00, 
     1972-04-16 00:00:00, 1972-05-16 12:00:00, 1972-06-16 00:00:00, 
     1972-07-16 12:00:00, 1972-08-16 12:00:00, 1972-09-16 00:00:00, 
     1972-10-16 12:00:00, 1972-11-16 00:00:00, 1972-12-16 12:00:00, 
     1973-01-16 12:00:00, 1973-02-15 00:00:00, 1973-03-16 12:00:00, 
     1973-04-16 00:00:00, 1973-05-16 12:00:00, 1973-06-16 00:00:00, 
     1973-07-16 12:00:00, 1973-08-16 12:00:00, 1973-09-16 00:00:00, 
     1973-10-16 12:00:00, 1973-11-16 00:00:00, 1973-12-16 12:00:00, 
     1974-01-16 12:00:00, 1974-02-15 00:00:00, 1974-03-16 12:00:00, 
     1974-04-16 00:00:00, 1974-05-16 12:00:00, 1974-06-16 00:00:00, 
     1974-07-16 12:00:00, 1974-08-16 12:00:00, 1974-09-16 00:00:00, 
     1974-10-16 12:00:00, 1974-11-16 00:00:00, 1974-12-16 12:00:00, 
     1975-01-16 12:00:00, 1975-02-15 00:00:00, 1975-03-16 12:00:00, 
     1975-04-16 00:00:00, 1975-05-16 12:00:00, 1975-06-16 00:00:00, 
     1975-07-16 12:00:00, 1975-08-16 12:00:00, 1975-09-16 00:00:00, 
     1975-10-16 12:00:00, 1975-11-16 00:00:00, 1975-12-16 12:00:00, 
     1976-01-16 12:00:00, 1976-02-15 00:00:00, 1976-03-16 12:00:00, 
     1976-04-16 00:00:00, 1976-05-16 12:00:00, 1976-06-16 00:00:00, 
     1976-07-16 12:00:00, 1976-08-16 12:00:00, 1976-09-16 00:00:00, 
     1976-10-16 12:00:00, 1976-11-16 00:00:00, 1976-12-16 12:00:00, 
     1977-01-16 12:00:00, 1977-02-15 00:00:00, 1977-03-16 12:00:00, 
     1977-04-16 00:00:00, 1977-05-16 12:00:00, 1977-06-16 00:00:00, 
     1977-07-16 12:00:00, 1977-08-16 12:00:00, 1977-09-16 00:00:00, 
     1977-10-16 12:00:00, 1977-11-16 00:00:00, 1977-12-16 12:00:00, 
     1978-01-16 12:00:00, 1978-02-15 00:00:00, 1978-03-16 12:00:00, 
     1978-04-16 00:00:00, 1978-05-16 12:00:00, 1978-06-16 00:00:00, 
     1978-07-16 12:00:00, 1978-08-16 12:00:00, 1978-09-16 00:00:00, 
     1978-10-16 12:00:00, 1978-11-16 00:00:00, 1978-12-16 12:00:00, 
     1979-01-16 12:00:00, 1979-02-15 00:00:00, 1979-03-16 12:00:00, 
     1979-04-16 00:00:00, 1979-05-16 12:00:00, 1979-06-16 00:00:00, 
     1979-07-16 12:00:00, 1979-08-16 12:00:00, 1979-09-16 00:00:00, 
     1979-10-16 12:00:00, 1979-11-16 00:00:00, 1979-12-16 12:00:00, 
     1980-01-16 12:00:00, 1980-02-15 00:00:00, 1980-03-16 12:00:00, 
     1980-04-16 00:00:00, 1980-05-16 12:00:00, 1980-06-16 00:00:00, 
     1980-07-16 12:00:00, 1980-08-16 12:00:00, 1980-09-16 00:00:00, 
     1980-10-16 12:00:00, 1980-11-16 00:00:00, 1980-12-16 12:00:00, 
     1981-01-16 12:00:00, 1981-02-15 00:00:00, 1981-03-16 12:00:00, 
     1981-04-16 00:00:00, 1981-05-16 12:00:00, 1981-06-16 00:00:00, 
     1981-07-16 12:00:00, 1981-08-16 12:00:00, 1981-09-16 00:00:00, 
     1981-10-16 12:00:00, 1981-11-16 00:00:00, 1981-12-16 12:00:00, 
     1982-01-16 12:00:00, 1982-02-15 00:00:00, 1982-03-16 12:00:00, 
     1982-04-16 00:00:00, 1982-05-16 12:00:00, 1982-06-16 00:00:00, 
     1982-07-16 12:00:00, 1982-08-16 12:00:00, 1982-09-16 00:00:00, 
     1982-10-16 12:00:00, 1982-11-16 00:00:00, 1982-12-16 12:00:00, 
     1983-01-16 12:00:00, 1983-02-15 00:00:00, 1983-03-16 12:00:00, 
     1983-04-16 00:00:00, 1983-05-16 12:00:00, 1983-06-16 00:00:00, 
     1983-07-16 12:00:00, 1983-08-16 12:00:00, 1983-09-16 00:00:00, 
     1983-10-16 12:00:00, 1983-11-16 00:00:00, 1983-12-16 12:00:00, 
     1984-01-16 12:00:00, 1984-02-15 00:00:00, 1984-03-16 12:00:00, 
     1984-04-16 00:00:00, 1984-05-16 12:00:00, 1984-06-16 00:00:00, 
     1984-07-16 12:00:00, 1984-08-16 12:00:00, 1984-09-16 00:00:00, 
     1984-10-16 12:00:00, 1984-11-16 00:00:00, 1984-12-16 12:00:00, 
     1985-01-16 12:00:00, 1985-02-15 00:00:00, 1985-03-16 12:00:00, 
     1985-04-16 00:00:00, 1985-05-16 12:00:00, 1985-06-16 00:00:00, 
     1985-07-16 12:00:00, 1985-08-16 12:00:00, 1985-09-16 00:00:00, 
     1985-10-16 12:00:00, 1985-11-16 00:00:00, 1985-12-16 12:00:00, 
     1986-01-16 12:00:00, 1986-02-15 00:00:00, 1986-03-16 12:00:00, 
     1986-04-16 00:00:00, 1986-05-16 12:00:00, 1986-06-16 00:00:00, 
     1986-07-16 12:00:00, 1986-08-16 12:00:00, 1986-09-16 00:00:00, 
     1986-10-16 12:00:00, 1986-11-16 00:00:00, 1986-12-16 12:00:00, 
     1987-01-16 12:00:00, 1987-02-15 00:00:00, 1987-03-16 12:00:00, 
     1987-04-16 00:00:00, 1987-05-16 12:00:00, 1987-06-16 00:00:00, 
     1987-07-16 12:00:00, 1987-08-16 12:00:00, 1987-09-16 00:00:00, 
     1987-10-16 12:00:00, 1987-11-16 00:00:00, 1987-12-16 12:00:00, 
     1988-01-16 12:00:00, 1988-02-15 00:00:00, 1988-03-16 12:00:00, 
     1988-04-16 00:00:00, 1988-05-16 12:00:00, 1988-06-16 00:00:00, 
     1988-07-16 12:00:00, 1988-08-16 12:00:00, 1988-09-16 00:00:00, 
     1988-10-16 12:00:00, 1988-11-16 00:00:00, 1988-12-16 12:00:00, 
     1989-01-16 12:00:00, 1989-02-15 00:00:00, 1989-03-16 12:00:00, 
     1989-04-16 00:00:00, 1989-05-16 12:00:00, 1989-06-16 00:00:00, 
     1989-07-16 12:00:00, 1989-08-16 12:00:00, 1989-09-16 00:00:00, 
     1989-10-16 12:00:00, 1989-11-16 00:00:00, 1989-12-16 12:00:00, 
     1990-01-16 12:00:00, 1990-02-15 00:00:00, 1990-03-16 12:00:00, 
     1990-04-16 00:00:00, 1990-05-16 12:00:00, 1990-06-16 00:00:00, 
     1990-07-16 12:00:00, 1990-08-16 12:00:00, 1990-09-16 00:00:00, 
     1990-10-16 12:00:00, 1990-11-16 00:00:00, 1990-12-16 12:00:00, 
     1991-01-16 12:00:00, 1991-02-15 00:00:00, 1991-03-16 12:00:00, 
     1991-04-16 00:00:00, 1991-05-16 12:00:00, 1991-06-16 00:00:00, 
     1991-07-16 12:00:00, 1991-08-16 12:00:00, 1991-09-16 00:00:00, 
     1991-10-16 12:00:00, 1991-11-16 00:00:00, 1991-12-16 12:00:00, 
     1992-01-16 12:00:00, 1992-02-15 00:00:00, 1992-03-16 12:00:00, 
     1992-04-16 00:00:00, 1992-05-16 12:00:00, 1992-06-16 00:00:00, 
     1992-07-16 12:00:00, 1992-08-16 12:00:00, 1992-09-16 00:00:00, 
     1992-10-16 12:00:00, 1992-11-16 00:00:00, 1992-12-16 12:00:00, 
     1993-01-16 12:00:00, 1993-02-15 00:00:00, 1993-03-16 12:00:00, 
     1993-04-16 00:00:00, 1993-05-16 12:00:00, 1993-06-16 00:00:00, 
     1993-07-16 12:00:00, 1993-08-16 12:00:00, 1993-09-16 00:00:00, 
     1993-10-16 12:00:00, 1993-11-16 00:00:00, 1993-12-16 12:00:00, 
     1994-01-16 12:00:00, 1994-02-15 00:00:00, 1994-03-16 12:00:00, 
     1994-04-16 00:00:00, 1994-05-16 12:00:00, 1994-06-16 00:00:00, 
     1994-07-16 12:00:00, 1994-08-16 12:00:00, 1994-09-16 00:00:00, 
     1994-10-16 12:00:00, 1994-11-16 00:00:00, 1994-12-16 12:00:00, 
     1995-01-16 12:00:00, 1995-02-15 00:00:00, 1995-03-16 12:00:00, 
     1995-04-16 00:00:00, 1995-05-16 12:00:00, 1995-06-16 00:00:00, 
     1995-07-16 12:00:00, 1995-08-16 12:00:00, 1995-09-16 00:00:00, 
     1995-10-16 12:00:00, 1995-11-16 00:00:00, 1995-12-16 12:00:00, 
     1996-01-16 12:00:00, 1996-02-15 00:00:00, 1996-03-16 12:00:00, 
     1996-04-16 00:00:00, 1996-05-16 12:00:00, 1996-06-16 00:00:00, 
     1996-07-16 12:00:00, 1996-08-16 12:00:00, 1996-09-16 00:00:00, 
     1996-10-16 12:00:00, 1996-11-16 00:00:00, 1996-12-16 12:00:00, 
     1997-01-16 12:00:00, 1997-02-15 00:00:00, 1997-03-16 12:00:00, 
     1997-04-16 00:00:00, 1997-05-16 12:00:00, 1997-06-16 00:00:00, 
     1997-07-16 12:00:00, 1997-08-16 12:00:00, 1997-09-16 00:00:00, 
     1997-10-16 12:00:00, 1997-11-16 00:00:00, 1997-12-16 12:00:00, 
     1998-01-16 12:00:00, 1998-02-15 00:00:00, 1998-03-16 12:00:00, 
     1998-04-16 00:00:00, 1998-05-16 12:00:00, 1998-06-16 00:00:00, 
     1998-07-16 12:00:00, 1998-08-16 12:00:00, 1998-09-16 00:00:00, 
     1998-10-16 12:00:00, 1998-11-16 00:00:00, 1998-12-16 12:00:00, 
     1999-01-16 12:00:00, 1999-02-15 00:00:00, 1999-03-16 12:00:00, 
     1999-04-16 00:00:00, 1999-05-16 12:00:00, 1999-06-16 00:00:00, 
     1999-07-16 12:00:00, 1999-08-16 12:00:00, 1999-09-16 00:00:00, 
     1999-10-16 12:00:00, 1999-11-16 00:00:00, 1999-12-16 12:00:00, 
     2000-01-16 12:00:00, 2000-02-15 00:00:00, 2000-03-16 12:00:00, 
     2000-04-16 00:00:00, 2000-05-16 12:00:00, 2000-06-16 00:00:00, 
     2000-07-16 12:00:00, 2000-08-16 12:00:00, 2000-09-16 00:00:00, 
     2000-10-16 12:00:00, 2000-11-16 00:00:00, 2000-12-16 12:00:00, 
     2001-01-16 12:00:00, 2001-02-15 00:00:00, 2001-03-16 12:00:00, 
     2001-04-16 00:00:00, 2001-05-16 12:00:00, 2001-06-16 00:00:00, 
     2001-07-16 12:00:00, 2001-08-16 12:00:00, 2001-09-16 00:00:00, 
     2001-10-16 12:00:00, 2001-11-16 00:00:00, 2001-12-16 12:00:00, 
     2002-01-16 12:00:00, 2002-02-15 00:00:00, 2002-03-16 12:00:00, 
     2002-04-16 00:00:00, 2002-05-16 12:00:00, 2002-06-16 00:00:00, 
     2002-07-16 12:00:00, 2002-08-16 12:00:00, 2002-09-16 00:00:00, 
     2002-10-16 12:00:00, 2002-11-16 00:00:00, 2002-12-16 12:00:00, 
     2003-01-16 12:00:00, 2003-02-15 00:00:00, 2003-03-16 12:00:00, 
     2003-04-16 00:00:00, 2003-05-16 12:00:00, 2003-06-16 00:00:00, 
     2003-07-16 12:00:00, 2003-08-16 12:00:00, 2003-09-16 00:00:00, 
     2003-10-16 12:00:00, 2003-11-16 00:00:00, 2003-12-16 12:00:00, 
     2004-01-16 12:00:00, 2004-02-15 00:00:00, 2004-03-16 12:00:00, 
     2004-04-16 00:00:00, 2004-05-16 12:00:00, 2004-06-16 00:00:00, 
     2004-07-16 12:00:00, 2004-08-16 12:00:00, 2004-09-16 00:00:00, 
     2004-10-16 12:00:00, 2004-11-16 00:00:00, 2004-12-16 12:00:00, 
     2005-01-16 12:00:00, 2005-02-15 00:00:00, 2005-03-16 12:00:00, 
     2005-04-16 00:00:00, 2005-05-16 12:00:00, 2005-06-16 00:00:00, 
     2005-07-16 12:00:00, 2005-08-16 12:00:00, 2005-09-16 00:00:00, 
     2005-10-16 12:00:00, 2005-11-16 00:00:00, 2005-12-16 12:00:00], standard_name=u'time', calendar=u'365_day', long_name=u'time', var_name='time')

Merci!

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2017-08-23 ErikaAWT

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2

Vous pouvez définir une contrainte de temps et utiliser la contrainte pour extraire du cube. Le guide de l'utilisateur Iris a une section sur les contraintes; voir http://scitools.org.uk/iris/docs/latest/userguide/loading_iris_cubes.html#constrained-loading. Nous nous intéresserons particulièrement à la sous-section sur la contrainte à temps, car nous devrons produire une contrainte de temps ici.

Dans ce cas, nous devons construire une contrainte de temps qui peut être utilisé pour extraire des deux ensembles de données toutes les valeurs inclusivement dans les années 1950 - 2005. Vous pouvez le faire comme suit:

iris.FUTURE.cell_datetime_objects = True 
t_constraint = iris.Constraint(time=lambda cell: 1950 <= cell.point.year <= 2005) 
shorter_series_1 = longer_series_cube.extract(t_constraint) 
shorter_series_2 = shorter_series_cube.extract(t_constraint)

Notez que strictement le deuxième extrait (pour faire shorter_series_2) ne fait rien dans ce cas, mais je l'ai inclus pour l'exhaustivité. L'appel iris.FUTURE signifie que nous pouvons utiliser des cellules (effectivement un seul point et ses limites d'une coord) comme s'il s'agissait d'objets datetime Python, ce qui nous permet d'appeler cell.point.year dans la lambda à l'intérieur de la contrainte.

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2017-08-25 15:06:57 DPeterK

1

La méthode subset fait-elle ce que vous voulez?

E.g.

longer_series_cube.subset(shorter_series_cube.coord('time'))

d'extraire des mois de la série la plus longue correspondant à la série la plus courte.

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2017-08-24 14:53:30 RuthC

+0

Le sous-ensemble est une manière élégante de résoudre ce cas particulier où la coordonnée la plus courte est complètement contenue par la coordonnée la plus longue - une belle solution @RuthC! Une solution plus générale serait d'utiliser une contrainte cohérente pour extraire des deux coeurs - je posterai une autre réponse pour démontrer cette approche. – DPeterK

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