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exec Scilab Group Scilab Function exec
NAME
exec - script file execution
CALLING SEQUENCE
exec(path [,mode])
exec(fun [,mode])
ierr=exec(path,'errcatch' [,mode])
ierr=exec(fun,'errcatch' [,mode])
PARAMETERS
path : a string, the path of the script file
mode : an integer scalar, the execution mode (see below)
fun : a scilab function
ierr : integer, 0 or error number
DESCRIPTION
exec(path [,mode]) executes sequentialy the scilab instructions contained
in the file given by path with an optional execution mode mode .
The different cases for mode are :
0 : the default value
-1 : nothing is printed
1 : echo of each command line
2 : prompt --> is printed
3 : echoes + prompts
4 : stops before each prompt
7 : stops + prompts + echoes : useful mode for demos.
exec(fun [,mode]) executes function fun as a script: no input nor
output argument nor specific variable environment. This form is more
efficient, because script code may be pre-compiled (see getf, comp).
This method for script evaluation allows to store scripts as function
in libraries.
If an error is encountered while executing , if 'errcatch' flag is
present exec issues an error message, aborts execution of the
instructions and resume with ierr equal to the error number,if
'errcatch' flag is not present, standard error handling works.
REMARK
exec files may now be used to define functions using the inline function
definition syntax (see function).
EXAMPLES
// create a script file
write(TMPDIR+'/myscript','a=1;b=2')
// execute it
exec(TMPDIR+'/myscript')
who
//create a function
deff('y=foo(x)','a=x+1;y=a^2')
clear a b
//execute the function
foo(1)
// a is a variable created in the environment of the function foo
// it is destroyed when foo returns
who
x=1 //create x to make it known by the script foo
exec(foo)
// a and y are created in the current environment
who
SEE ALSO
getf, execstr, evstr, comp, mode, chdir, getcwd
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