Error with evalfis function

15 次查看（过去 30 天）
alex tzal
alex tzal 2018-2-4
评论： Walter Roberson 2018-2-19
When I run evalfis, I get the following error "Error using evalfismex Illegal parameters in fisTrapezoidMf() --> b > c". Can you please help?
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2018-2-19
alex: did you try putting in the linear constraint like I indicated?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2018-2-5
It sounds as if you are calling fisTrapezoidMf with three parameters in which the second parameter is greater than the third parameter, but that routine needs the third parameter to be greater than the second parameter.
  8 个评论
显示 6更早的评论
alex tzal
alex tzal 2018-2-10
编辑：alex tzal 2018-2-10
I am using PSO in my ANFIS as per:
http://yarpiz.com/tag/training-anfis-using-pso
The problem is identified when the Problem.VarMin, Problem.VarMax, Params.MaxIt and Params.nPop parameters change in the TrainFISCost function. Could you please help me understand how are these related to trapmf parameters?
Walter Roberson
Walter Roberson 2018-2-16
None of those values matter in themselves for this purpose. What matters is that you need a linear constraint to prevent the third parameter from being less than the second parameter. In terms of A, b linear inequalities, that would look like
A = [1 -1 0 0;
0 1 -1 0;
0 0 1 -1]
b = [0; 0; 0]
The above permits the values to be exactly equal. Getting a strict inequality is tricky because of round-off error, but you could often approximate by setting b to -eps in each location instead of 0

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Fuzzy Inference System Tuning 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by