exec

Arguments

path

a string, the path of the script file.

mode

an integer scalar, the execution mode (see below).

fun

a Scilab function.

ierr

an integer, 0 or error number.

Description

exec(path [,mode]) executes sequentially 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. Execution resumes after a carriage return.

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 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 no error message, aborts execution of the instructions and resumes with ierr equal to the error number. If 'errcatch' flag is not present, standard error handling works.

Remarks

exec files may now be used to define functions using the inline function definition syntax (see function).

exec supports files encoded as ANSI/ASCII and UTF-8.

The length of each line in a file is limited to 4096 characters.

Examples

// create a script file
mputl('a=1;b=2',TMPDIR+'/myscript')

// execute it
exec(TMPDIR+'/myscript')
whos -name "a "

// create a function
deff('y=foo(x)','a=x+1;y=a^2')
clear a b
// call the function
foo(1)
// a is a variable created in the environment of the function foo
//    it is destroyed when foo returns
whos -name "a "

x=1 //create x to make it known by the script foo
exec(foo)

// a and y are created in the current environment
whos -name "a "
whos -name "y "

See also

• execstr — execute Scilab code in strings
• evstr — evaluation of expressions
• mode — select a mode in an exec-file
• chdir — changes Scilab current directory
• pwd — gets Scilab current directory