Combine two geo-referenced arrays in one plot by differencing, summing or averaging.Slice 1D arrays from larger multidimensional variables and create line plots.Slice and plot 'generic' 2D arrays from larger multidimensional variables.Slice and plot geo-referenced latitude-longitude, latitude-vertical, longitude-vertical, time-latitude or time-vertical arrays from larger multidimensional variables.In IDL, CDF attributes are created with CDF_ATTPUT and retrieved with CDF_ATTGET. Note however, that variables cannot have multiple attributes with the same names. A global attribute “MODS” might be used to keep track of the modification history of a CDF file (see CDF_ATTPUT). A vector zVariable might have a zAttribute named “Location” with values such as. For example, every rVariable in a CDF file might have an rAttribute named “Date”. In the case of vector, or multiple entry, attributes the user must keep track of the entry numbers (in CDF terms these are the gEntry, rEntry, or zEntry numbers depending on attribute type). CDF attributes can be scalar or vector in nature, and of any valid datatype. Attributes can contain auxiliary information about an entire CDF file (global scope attributes or gAttributes), or about particular CDF variables (variable scope attributes or rAttributes/zAttributes depending on variable type).

.cdf files for trigonometry