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nemoinp - parse a user supplied number string


nemoinp [parameter=value] ...


nemoinp parses an expression supplied by the user, using the rules as given by nemoinp(3NEMO) . The output format can be defined too, separators, newlines etc. can be choosen at will. See also the EXAMPLES below.

It may come in handy to set an array in a shell variable or to initialize tables, e.g. nemoinp 1:10:2 will then result in 1 3 5 7 9. Although such implied loops are a common feature of scripting environments, there are subtle differences:

nemoinp        1:10:2
matlab        1:2:10
seq        1 2 10
numpy.arange    1,10,2    last element (10) is never used


The following parameters are recognized in any order if the keyword is also given:
expression to be parsed [default: empty ].
The string which is appended to the format string described in previous keyword and is used to separate the numbers output. When no string is supplied, a blank is used. [default: empty].
Valid C-format descriptor used in printf(3) to output the numbers. When %d is used, integer math is forced. See also next keyword for output number separator. [default: %g].
Should a newline be added after each number parsed. This is often useful in cases nemoinp is used to generate the independant coordinate when tables have to be generated from scratch. [Default: t].
Size of scratch array to be allocated dynamically for the parsed number [default: 32768].
Optional table output. Default: none
Seed for xrandom(3NEMO) . Default: 0
Merely provided to test what natof returns. Note that this function does not perform any error checking and can return the wrong number.
Force parsing the (optionally comma separated) string(s) as D:M:S.S, converting them to fractional degrees. For H:M:S parsing the user is responsible for the extra factor of 15. Default: f.


The number of elements in an array is limited, currently hardcoded to 32678 in nemoinp(3NEMO) . If possible, use seq(1) .

See Also

seq(1) , tabgen(1NEMO) , tabmath(1NEMO) , nemoinp(3NEMO) , getrange(3NEMO) , functions(5NEMO)


   nemoinp 4.2+3.1           simple math
   nemoinp ’sqrt(2)’         math functions
   nemoinp pi+3              some support for funny numbers
   nemoinp 2:20:4            from 2 to 20 in steps of 4 (NEMO command)
   seq 2 4 20                from 2 to 20 in steps of 4 (UNIX command)
   set n=20                  a (t)C-shell variable
   n=20                 a bash/zsh variable
   nemoinp 2:${n}:4          as before, now using a shell variable
   nemoinp 2::4              repeat the value 4 times
   nemoinp ’10**[0:3:1]’     log spaced values  1 10 100 1000
   nemoinp ’iflt(1,2,3,4)’   print 3, not 4, because 1 is less than 2
   nemoinp 30:30:15 dms=t    convert hexasegimal 30:30:15 into decimal
   nemoinp c,G,h,p,m         a few good constants
   nemoinp ’p*pi/(3600*180)’ 1 AU in km


Peter Teuben

Update History

18-apr-89    V1.0 created    PJT
20-jun-89    V1.0a small changed - doc updated    PJT
 5-jul-89    V1.1 added nmax parameter    PJT
18-may-92    documentation
16-jun-97    V1.6 %d forces integer math    PJT
28-aug-00    V1.7 documented tab= and seed=    PJT
31-may-01    V1.8 added atof=    PJT
4-mar-03    V1.9 added dms=      PJT

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