search for: has_tag_bit_mask

...he sxpinfo gp field (LEVELS, 16 bits) are packed into a single * integer. The integer is signed, so this shouldn't be pushed too * far. It assumes at least 28 bits, but that should be no problem. */ #define IS_OBJECT_BIT_MASK (1 << 8) #define HAS_ATTR_BIT_MASK (1 << 9) #define HAS_TAG_BIT_MASK (1 << 10) #define IS_CONSTANT_MASK (1 << 11) /* <<--- added in pqR */ #define ENCODE_LEVELS(v) ((v) << 12) #define DECODE_LEVELS(v) ((v) >> 12) #define DECODE_TYPE(v) ((v) & 255) Please let me know if you see any problem with this, or if for some reason you&...

Currently, I load the RData file then ls() and str(). But loading the file takes too long if the file is big. Most of the time, I only interested what the variables are in the the file and the attributes of the variables (like if it is a data.frame, matrix, what are the colnames/rownames, etc.) I'm wondering if there is any facility in R to help me avoid loading the whole file.