Built in functions and procedures

The following is a list of built in functions and procedures of the Mosel language (excluding modules). Functions return a value; procedures do not.

Dynamic array handling

create    exists    delcell   isdynamic

Freeze (finalize) a dynamic set

finalize

Rounding functions

ceil      floor     round     abs

Mathematical functions

exp       log       ln        sqrt
cos       sin       arctan
isodd

Special real values

isfinite  isinf     isnan 

Random number generator

random    setrandseed

Minimum/maximum of a list of values

v := minlist(5, 7, 2, 9)
w := maxlist(CAP(1), CAP(2))

Inline ``if'' function

MAX_INVEN(t) := if(t < MAX_TIME, 1000, 0)

Inven(t) := stock(t) = buy(t) - sell(t) +
              if(t > 1, stock(t-1), 0)

Matrix export to file

exportprob

File handling

fopen         fclose        fselect
getfid        getfname      getreadcnt
iseof         fflush        fskipline
fwrite[_] / fwriteln[_]
read / readln   write[_] / writeln[_]  

String handling

strfmt        substr        _

Access and modify model objects

getcoeff[s]   setcoeff      getvars
sethidden     ishidden      setname      setrange
gettype       settype       getsize
makesos1      makesos2
getelt        getfirst      getlast      findfirst
findlast      gethead       gettail      cutelt
cutfirst      cutlast       cuthead      cuttail
reverse       getreverse    splithead    splittail

Access solution values

getobjval
getsol        getrcost
getslack      getact        getdual

Exit from a model

exit

Mosel controls

getparam      setparam    localsetparam  restoreparam

Date/time

currentdate   currenttime   timestamp

Bit value handling

bitflip       bitneg        bitset
bitshift      bittest       bitval

Miscellaneous

asproc        assert        compare      datablock
memoryuse     newmuid       publish      unpublish
reset         setioerr      setmatherr
versionnum    versionstr

• Overloading of subroutines
  • Some functions or procedures are overloaded: a single subroutine can be called with different types and numbers of arguments
• Additional subroutines are provided by Mosel library modules, which extend the basic Mosel language, e.g.,
  • mmxprs: Xpress Optimizer
  • mmodbc: ODBC data connection
  • mmsystem: system calls; text handling
  • mmjobs: handling multiple models and (remote) Mosel instances
  • mmsvg: graphics
  ⇒See the `Mosel Language Reference Manual' for full details
• User-defined functions and procedures
  • You can also write your own functions and procedures within a Mosel model
  • Structure of subroutines is similar to a model (may have declarations blocks)
  • User subroutines may define overloaded versions of built in subroutines
  ⇒See examples in the `Mosel User Guide' (Chapter Functions and procedures)
• Packages
  • Additional subroutines may also be provided through packages (Mosel libraries written in the Mosel language as opposed to Mosel modules that are implemented in C)
  ⇒See the `Mosel User Guide' for further detail (Chapter Packages)