matlab\lang ----------------- Programming language constructs.
matlab\elmat --------------- Elementary matrices and matrix manipulation.
matlab\elfun ---------------- Elementary math functions.
matlab\specfun ----------- Specialized math functions.
matlab\matfun ------------- Matrix functions - numerical linear algebra.
simulink\simulink ------- Simulink
simulink\blocks ---------- Simulink block library.
simulink\simdemos --- Simulink 3 demonstrations and samples.
simulink\dee -------------- Differential Equation Editor
MATLABR11\work ------ (No table of contents file)
toolbox\local -------------- Preferences.
如果用户对 MATLAB 的语言结构 lang 感兴趣，想进一步了解，则键入：
help lang
Programming language constructs.
Control flow.
if ----------- Conditionally execute statements.
else ------ IF statement condition.
elseif ---- IF statement condition.
end ------ Terminate scope of FOR, WHILE, SWITCH, TRY and IF statements.
for -------- Repeat statements a specific number of times.
while --- Repeat statements an indefinite number of times.
如果想进一步了解 for 语句，则键入：
help for
FOR Repeat statements a specific number of times.
