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Asked by Lalit Patil
on 24 Jan 2013

function out = Tanvismembershipfunction(x, params) for i=1:length(x) if x(i)<params(1) y(i)= 2 * abs(x(i) - 0.5); elseif x(i)<params(2) y(i)= 2 * abs(x(i) - 0.5); else x(i)<params(3) y(i)= 2 * abs(x(i) - 0.5); end out=.1*y'; % scaling the output to lie between 0 and 1

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Answer by Walter Roberson
on 24 Jan 2013

Accepted answer

There is no way to get that graph by just altering the params() values in that code.

Instead consider

y = 2 * abs(x - 0.5)

Lalit Patil
on 24 Jan 2013

In my plot should be 3points..

In sequence at 1,0,1 on y-axis..

But i am getting like 0.1 0 0.1

I given parameters [0 0.5 1]

Range [0 1] , dispay range [0 1]

and i modified the code above..

Walter Roberson
on 24 Jan 2013

Change the 2 to 20 if you insist on using that function structure

Answer by Jing
on 24 Jan 2013

If you want to use it in a fuzzy logic/control problem, TRAPMF or TRIMF can easily create the function like that.

x=0:0.1:1; y=1-trimf(x,[0 0.5 1]); plot(x,y)

Lalit Patil
on 24 Jan 2013

sorry, but i want to create the same thing without function...

x = 0:0.1:1 for i=1:length(x) if x(i)<params(1) y(i)= 2 * abs(x(i) - 0.5); elseif x(i)<params(2) y(i)= 2 * abs(x(i) - 0.5); else x(i)<params(3) y(i)= 2 * abs(x(i) - 0.5); end end out=.1*y'; plot(x,out)

This works well in command window but not in fuzzy GUI... problem is mensioned in aboves answer..

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