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
gettype         settype         getsize
makesos1        makesos2
getfirst        getlast         findfirst
findlast        reverse         getreverse
gethead         gettail         cuthead
cuttail         splithead       splittail

Access solution values

getobjval
getsol          getrcost
getslack        getact         getdual

Exit from a model

exit

Mosel controls

getparam        setparam

Date/time

currentdate     currenttime    timestamp

Bit value handling

bitflip         bitneg         bitset
bitshift        bittest        bitval

Miscellaneous

asproc          assert          reset
setioerr        setmatherr
publish         unpublish

• 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)