rec
is not a native Symbolic Toolbox function. It belongs to MuPAD which is a separate package that Mathworks acquired and added to Symbolic Toolbox. To use it you need to first enter mupad
command in command window then you enter the command that uses rec
in MuPAD window that pops up.
Syntax error in MATLAB recurrence equation
Domanda
I have looked up here how to declare recurrence equations.
I tried the following example from that page:
>> solve(rec(y(n + 1) = 3*(n + 1)*y(n), y(n), {y(0) = 1}))
|
Error: The expression to the left of the equals sign is not a valid target for an assignment.
Then I noticed that I didn't have the Symbolic Math Toolbox
installed. After the installation
>> ver
returned (among some others):
MATLAB Version 8.1 (R2013a)
Symbolic Math Toolbox Version 5.10 (R2013a)
but I still got the above error.
I could narrow the command down to the following, giving the same above error:
>> rec(y(n + 1) = y(n), y(n), {y(0) = 1})
|
Error: The expression to the left of the equals sign is not a valid target for an assignment.
On the wiki and other google results, the error is only mentioned with a error when confusing =
with ==
.
Soluzione
Autorizzato sotto: CC-BY-SA insieme a attribuzione
Non affiliato a StackOverflow