How to write umax*exp(1​./((th-th0​).*(th-th1​)))/en for th0<th<th1 in matlab?

, ,

I saw something related to my question

 uu = @(th) vif(th>ph0&th<ph1,umax*exp(1./((th-ph0).*(th-ph1)))/en,0)

but unfortunately, 'vif' is not defined. Please I need clarification.

Answer 1

[Walter Roberson]

Assuming that you have assigned a definite vector of values to th, then:

y = nan(size(th));
mask = th0 < th & th < th1;
y(mask) = umax*exp(1​./((th(mask)-th0​).*(th(mask)-th1​)))/en;

[Kayode Odeyemi]

Thanks. God bless you. Yes, definite vector of values have assigned to th and umax. I want to write it like

uu = @(th) vif(th>ph0&th<ph1,umax*exp(1./((th-ph0).*(th-ph1)))/en,0)

where vif will also be a function. Please, I need your help.

[Walter Roberson]

Why do you want to write it that way?

Have you considered using piecewise() from the symbolic toolbox?