IDL does not support this.Brace Completer does exactly what the name says. The C printf function allows using %*d notation to indicate that the field width will be supplied by the next argument, and the argument following that supplies the actual value.The C printf function allows using % n$d notation to specify that arguments should be substituted into the format string in a different order than they are listed.Therefore, the u, h, l, and ll codes are not required in IDL and are not accepted. IDL uses the type of the arguments being substituted into the format to determine this information.
For example, the C printf/ scanf functions require using the %u format code to indicate an unsigned value, and also use type modifiers (h, l, ll) to indicate the size of the data being processed. Most C printf functions accept more codes than these, but those codes are not supported or not necessary. Only the % format sequences listed above are understood by IDL.Using \n at the end of the format string to end the line is not necessary or recommended. The IDL PRINT and PRINTF procedures implicitly add an end-of-line character to the end of the line (unless suppressed by use of the $ format code).Differences Between C printf and IDL printf For example, you could use \% to insert a percent character, or \" to insert a double-quote character. Note: If a character not specified in this table is preceded by a backslash, the backslash is removed and the character is inserted without any special interpretation. Hexadecimal value hh (Hex value of 1-2 digits) Octal value ooo (Octal value of 1-3 digits) IDL supports the following "escape sequences" within the format string: The lowercase %x or %z will give lowercase hexadecimal digits, while the uppercase %X or %Z will give uppercase. Transfer data in hexadecimal notation, w is the total width, m is the minimum number of non-blank digits. Transfer character data until either a null byte (\0) or the total width w is reached. There is no difference between the lowercase and uppercase forms. Transfer data in octal notation, w is the total width, m is the minimum number of non-blank digits. Use %e or %E if exponent is less than –4 or greater than or equal to the precision, otherwise use %f. Transfer data in either floating-point or exponential notation, w is the total width, d is the total number of significant digits. Transfer data in floating-point notation, w is the total width, d is the number of digits after the decimal. Either a lowercase "e" or uppercase "E" will be used depending upon the code. Transfer data in exponential notation, w is the total width, d is the number of digits after the decimal. The %d forms are identical to the %i forms and are provided for programmers familiar with C's printf.
Transfer integer data, w is the total width, m is the minimum number of non-blank digits.
Transfer data in binary notation, w is the total width, m is the minimum number of non-blank digits. Finally, the flags and the width padding options described in Syntax are also available when using printf-style format codes. This % is treated as a regular character instead of as a format code specifier. In addition to the format codes described in the table, the special sequence %% causes a single % character to be written to the output. The following table lists the % format codes allowed within a printf-style quoted string format code, as well as their correspondence to the standard format codes that do the same thing.
Width specifications and default values are format-code specific, and are described with the format codes below. Optional, adds zero-padding on the left to match the width.Īn optional width specification.
Optional, specifies left justification of the output argument. The syntax of a C printf-style format code is: %C Use the C printf-style to print out six numbers surrounded by curly braces: PRINT, INDGEN( 3), FORMAT = 'The values are: Syntax The C printf-style format codes specify how data should be transferred using a format similar to that of the C printf function.