atomsUpdate Update one or several external modules

## Syntax

                result = atomsUpdate()
                result = atomsUpdate(name)
                result = atomsUpdate(name, section)

## Arguments

name

  1xn character string matrix : module's technical name

section

  This argument controls the list of sections where search modules to update.

  `section` is a single-string and its value should be :

  - `"all"`: Modules to remove are searched in both "user" and "allusers" sections.

  - `"allusers"`: Modules to remove are only searched in the "allusers" section.

  - `"user"`: Modules to remove are only searched in the "user" section.

  If SCI is write accessible, "all" is the default value. Otherwise, the default value is "user".

result

## Description

`atomsUpdate` update one or more external modules.

## Examples

    atomsSetConfig("Verbose","True");
    atomsRepositoryAdd("http://scene1.test.atoms.scilab.org");

    // Install toolbox_5
    atomsInstall("toolbox_5");

    disp(atomsGetInstalled());

    // Load the 2nd scenario in which toolbox_4 has been updated:
    // toolbox_4 version 1.1 has been added
    // (toolbox_4 is a dependency of toolbox_5)

    atomsRepositoryDel("http://scene1.test.atoms.scilab.org");
    atomsRepositoryAdd("http://scene2.test.atoms.scilab.org");

    // Update toolbox_5
    atomsUpdate("toolbox_5");
    disp(atomsGetInstalled());

    // Some cleaning
    atomsRepositoryDel("http://scene2.test.atoms.scilab.org");
    atomsRemove("toolbox_5");

## See also

- atomsInstall
- atomsRemove
- atomsGetInstalled