Does matlab have data type of sym?

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I set a as symbolic. Then I check if a is a char and I get a false. If later I ask the class of a then its char. Suppose I make the check if a is symbolic then I get true. Since the outcome of class is char I would expect that the check for char would also be true. Please see the example below.
>> clear
>> syms a
>> isa(a,'char')
ans =
0
>> class a
ans =
char
I would appreciate if you explain me what's going on. Thank you.

采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-2-4
编辑:Azzi Abdelmalek 2013-2-4
clear
syms a
class(a)
The class of a is sym, not char
  2 个评论
Giorgos Papakonstantinou
But is there really a sym class because I haven't find it in the documentation?
Walter Roberson
Walter Roberson 2013-2-4
sym is part of the symbolic toolbox, and so is documented separately.

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