functions in std.i - a

             abs(x)  
          or abs(x, y, z, ...)  
 
     returns the absolute value of its argument.  
     In the multi-argument form, returns sqrt(x^2+y^2+z^2+...).  

builtin function, documented at i0/std.i   line 630  

             acos(x)  
 
     returns the inverse cosine of its argument, range [0, pi].  

builtin function, documented at i0/std.i   line 535  

 acosh  
 
interpreted function, defined at i0/std.i   line 576  

             add_member, file, struct_name, offset, name, type, dimlist  
 
     adds a member to a data type in the file FILE.  The data type name  
     (struct name) is STRUCT_NAME, which will be created if it does  
     not already exist.  The new member will be at OFFSET (in bytes)  
     from the beginning of an instance of this structure, and will  
     have the specified NAME, TYPE, and DIMLIST.  Use OFFSET -1 to  
     have add_member compute the next available offset in the structure.  
     The TYPE can be either a structure definition, or a string naming  
     a previously defined data type in FILE.  The optional DIMLIST is  
     as for the "array" function.  
     The STRUCT_NAME built from a series of add_member calls cannot be  
     used until it is installed with install_struct.  
     This function should be used very sparingly, mostly in code which  
     is building the structure of a foreign-format binary file.  

builtin function, documented at i0/std.i   line 2454  

             failure= add_next_file(file, filename, create_flag)  
 
     adds the next file to the FILE, which must contain history records.  
     If FILENAME is non-nil, the new file will be called that, otherwise  
     the next sequential filename is used.  If CREATE_FLAG is present  
     and non-zero, the new file will be created if it does not already  
     exist.  If omitted or nil, CREATE_FLAG defaults to 1 if the file has  
     write permission and 0 if it does not.  
     Returns 0 on success.  

builtin function, documented at i0/std.i   line 2521  

             add_record, file, time, ncyc  
          or add_record, file, time, ncyc, address  
          or add_record, file  
 
     adds a new record to FILE corresponding to the specified TIME and  
     NCYC (respectively a double and a long).  Either or both TIME  
     and NCYC may be nil or omitted, but the existence of TIME and  
     NCYC must be the same for every record added to one FILE.  
     If present, ADDRESS specifies the disk address of the new record,  
     which is assumed to be in the current file.  Without ADDRESS, or  
     if ADDRESS<0, the next available address is used; this may create  
     a new file in the family (see the set_filesize function).  
     The add_record function leaves the new record current  
     for subsequent save commands to actually write the data.  
     The TIME, NCYC, and ADDRESS arguments may be equal length vectors  
     to add several records at once; in this case, the first of the  
     newly added records is the current one.  If all three of TIME,  
     NCYC, and ADDRESS are nil or omitted, no new records are added,  
     but the file becomes a record file if it was not already, and in  
     any case, no record will be the current record after such an  
     add_record call.  
     After the first add_record call (even if no records were added),  
     subsequent add_variable commands will create record variables.  
     After the first record has been added, subsequent save commands  
     will create any new variables as record variables.  
     After a second record has been added using add_record, neither  
     save commands nor add_variable commands may be used to introduce  
     any new record variables.  

builtin function, documented at i0/std.i   line 2279  

             add_variable, file, address, name, type, dimlist  
 
     adds a variable NAME to FILE at the specified ADDRESS, with the  
     specified TYPE and dimensions given by DIMLIST.  The DIMLIST may  
     be zero or more arguments, as for the "array" function.  If the  
     ADDRESS is <0, the next available address is used. Note that,  
     unlike the save command, add_variable does not actually write any  
     data -- it merely changes Yorick's description of the contents of  
     FILE.  
     After the first add_record call, add_variable adds a variable to  
     the record instead of a non-record variable.  See add_record.  

builtin function, documented at i0/std.i   line 2313  

             allof(x)  
             anyof(x)  
             nallof(x)  
             noneof(x)  
 
     Respectively:  
      returns 1 if every element of the array x is non-zero, else 0.  
      returns 1 if at least one element of the array x is non-zero, else 0.  
      returns 1 if at least one element of the array x is zero, else 0.  
      returns 1 if every element of the array x is zero, else 0.  

builtin function, documented at i0/std.i   line 742  

             alpha_primitives, file  
 
     sets FILE primitive data types to be native to DEC alpha workstations.  

interpreted function, defined at i0/std.i   line 1987  

             am_subroutine()  
 
     returns 1 if the current Yorick function was invoked as a subroutine,  
     else 0.  If am_subroutine() returns true, the result of the current  
     function will not be used, and need not be computed (the function  
     has been called for its side effects only).  

builtin function, documented at i0/std.i   line 508  

 anyof  
 
builtin function, documented at i0/std.i   line 742  

             area(y, x)  
 
     returns the zonal areas of the 2-D mesh (X, Y).  If Y and X are  
     imax-by-jmax, the result is (imax-1)-by-(jmax-1).  The area is  
     positive when, say, X increases with i and Y increases with j.  
     For example, area([[0,0],[1,1]],[[0,1],[0,1]]) is +1.  

interpreted function, defined at i0/std.i   line 2702  

             array(value, dimension_list)  
          or array(type, dimension_list)  
 
     returns an object of the same type as VALUE, consisting of copies  
     of VALUE, with the given DIMENSION_LIST appended to the dimensions  
     of VALUE.  Hence, array(1.5, 3, 1) is the same as [[1.5, 1.5, 1.5]].  
     In the second form, the VALUE is taken as scalar zero of the TYPE.  
     Hence, array(short, 2, 3) is the same as [[0s,0s],[0s,0s],[0s,0s]].  
     A DIMENSION_LIST is a list of arguments, each of which may be  
     any of the following:  
        (1) A positive scalar integer expression,  
	(2) An index range with no step field (e.g.-  1:10), or  
	(3) A vector of integers [number of dims, length1, length2, ...]  
	    (that is, the format returned by the dimsof function).  

builtin function, documented at i0/std.i   line 309  

             asin(x)  
 
     returns the inverse sine of its argument, range [-pi/2, pi/2].  

builtin function, documented at i0/std.i   line 529  

             asinh(x)  
             acosh(x)  
             atanh(x)  
 
     returns the inverse hyperbolic sine, cosine, or tangent of  
     its argument.  The range of acosh is >=0.0.  

interpreted function, defined at i0/std.i   line 576  

 at_pdb_close  
 
keyword,  defined at i0/std.i   line 1836  

             at_pdb_open  
             at_pdb_close  
 
     bits for optional behavior when a PDB file is opened or closed:  
     at_pdb_open:  
     000  Major-Order:  value specified in file is correct  
     001  Major-Order:102 always   
     002  Major-Order:  opposite from what file says  
     003  Major-Order:101 always  
     004  Strip Basis @... suffices from variable names (when possible)  
          Danger!  If you do this and open a file for update, the variable  
	  names will be stripped when you close the file!  
     010  Use Basis @history convention on input  
     The 001 and 002 bits may be overridden by the open102 keyword.  
     The default value of at_pdb_open is 010.  
     at_pdb_close (the value at the time the file is opened or created  
                   is remembered):  
     001  Write Major-Order 102 PDB file  
     002  Write PDB style history data  
        The following are no-ops unless bit 002 is set:  
     004  Use Basis @history convention on output  
     010  Do NOT pack all history record variables into  
          a single structure instance.  
     The 001 bit may be overridden by the close102 keyword or if  
     close102_default is non-zero.  
     The default value of at_pdb_close is 007.  

keyword,  defined at i0/std.i   line 1836  

             atan(x)  
          or atan(y, x)  
 
     returns the inverse tangent of its argument, range [-pi/2, pi/2].  
     In the two argument form, returns the angle from (1, 0) to (x, y),  
     in the range (-pi, pi], with atan(1, 0)==pi/2.  (If x>=0, this is  
     the same as atan(y/x).)  

builtin function, documented at i0/std.i   line 541  

 atanh  
 
interpreted function, defined at i0/std.i   line 576  

             avg(x)  
 
     returns the scalar average of all elements of its array argument.  

builtin function, documented at i0/std.i   line 736