eval

Evaluate Nelson code in string.

Syntax

  • eval(str)

  • eval(str, catch_str)

  • [r1, ... rn] = eval(str)

  • [r1, ... rn] = eval(str, catch_str)

Input argument

  • str - a string: Nelson instruction to execute

  • catch_str - a string: Nelson instruction to execute if an error is detected.

Output argument

  • [r1, ... rn] - results: output variables

Description

eval executes Nelson instructions given in a string.

Please use try catch end block instead than eval, if you need to capture an error message for higher performance.

Examples

eval('B=4')

This example will fail and returns an error message.

C = eval('B=4')
D = eval(4)

This example will not fail and return false.

eval('error(''blabla'')', 'l = lasterror(); disp([''lasterror message: '', l.message])')

See also

execstr, evalc, evalin.

History

Author

Allan CORNET

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