MATLAB DATA ACQUISITION TOOLBOX - RELEASE NOTES Manual de usuario descargar pdf (Pagina 36)

Release Notes for Release 13

Maximum Name Length Changed for Variables, Functions,

Files

Prior to this release, the length of MATLAB identifiers (variable names,

function and subfunction names, structure field names, M-file names, MEX-file

names, and MDL-file names) was restricted to 31 characters. Names using

more than 31 characters were either truncated by MATLAB or caused a

warning or error to be generated.

In MATLAB 6.5, any of these names can be up to 63 characters long.

A new function,

namelengthmax, returns the maximum length for MATLAB

identifiers.

namelengthmax

ans =

If you have MATLAB programs that hard-code the maximum identifier length

as 31, you should replace these hard-coded limits with a call to

namelengthmax.

If you use identifiers that exceed 63 characters, MATLAB issues a warning and

truncates any characters beyond the 63rd.

Characters Beyond 31 Are No Longer Ignored

In previous versions of MATLAB, if you had two or more long identifiers in

which the first 31 characters were identical, MATLAB ignored any characters

beyond the 31st and thus recognized only one of the identifiers. For example,

given these two Stateflow filenames

stateflow_modelname_with_40_characters_1.mdl

stateflow_modelname_with_40_characters_2.mdl

both appeared to MATLAB 6.1 as shown below, and MATLAB recognized only

one of the files.

stateflow_modelname_with_40_cha.mdl

In MATLAB 6.5, with the maximum MDL-file name length increased to 63,

MATLAB recognizes both files. You should be aware of this change, as it could

possibly lead to unexpected behavior.

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MATLAB DATA ACQUISITION TOOLBOX - RELEASE NOTES Manual de usuario Pagina 36