C Library Functions - M_matrix (3)

NAME

M_matrix(3f) - [M_matrix::INTRO] The Los Alamos-inspired Linear Algebra Fortran Facility (LALA) LICENSE(MIT)

Description
Examples

DESCRIPTION

The M_matrix module contains the Linear Algebra Fortran Facility (LALA) which allows for interacting with a Fortran program using Matlab

or Octave-like commands.
LALA is also usable as a simple one-line language. It is a WIP (Work In Progress) but is already useful.

o You can pass intrinsic-type data easily between your Fortran program and the LALA utility.

o blocks of LALA commands may be passed to lala(3f) as well.

o external files containing lala(3f) commands may be read to create data or as configuration files.

o LALA commands may be recorded and played back.

o a command-line based command history allowed for recalling and editing input.

o a stand-alone program lets you create and test LALA files. It is a flexible calculator utility all by itself.

o a built-in help command describes the many functions and commands

o a user-added Fortran routine may be called via the USER() function.

All together, this allows lala(3f) to be used for self-describing configuration and data files, inspecting data in existing programs, transferring small amounts of data between programs or assisting in debugging and development, unit testing and macro-level timing.

EXAMPLES

Sample program:

    program demo_M_matrix
    use M_matrix, only : lala, put_into_lala, get_from_lala, ifin_lala
    !real,allocatable             :: r
    !complex,allocatable          :: cvec(:)
    integer,allocatable          :: iarr(:,:)
    character(len=:),allocatable :: t(:)
    integer                      :: ierr
    integer                      :: i

    ! store some data into lala(3)
    call put_into_lala(’A’,[1,2,3,4,5]*10.5,ierr)
    write(*,*)’is A defined in LALA?’,ifin_lala(’A’)
    call lala(’A/2.0’)

    ! pass some commands to lala(3f)
    call lala([character(len=80) :: &
    &’PI=atan(1)*4               ’, &
    &"mytitle=’this is my title’;", &
    &’littlearray=<              ’, &
    &’   1 2 3;                  ’, &
    &’   4 5 6;                  ’, &
    &’   7 8 9;                  ’, &
    &’>                          ’, &
    &’S=sum(A)                   ’, &
    &’I=inv(littlearray);        ’, &
    &’B=littlearray*sin(PI/3)    ’, &
    &"save(’keepB’,B)            ", &
    &’’])

    ! read a file containing lala(3f) commands
    call lala("exec(’mycommands’);")

    ! interactively interact with lala(3f) interpreter
    call lala()

    ! get some data from LALA into the calling program
    call get_from_lala(’littlearray’,iarr,ierr)
    write(*,’(a)’)’IN CALLING PROGRAM IARR=’
    write(*,’(1x,*(g0,1x))’)(IARR(i,:),new_line(’A’),i=1,size(iarr,dim=1))

    call get_from_lala(’mytitle’,t,ierr)
    write(*,*)’IN CALLING PROGRAM T=’,t

    end program demo_M_matrix

Nemo Release 3.1

M_matrix (3)

February 23, 2025

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C Library Functions - M_matrix (3)

NAME

CONTENTS

DESCRIPTION

EXAMPLES