MATLAB Answers

How can I use arrayfun and integral as anonymous function?

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work wolf
work wolf on 10 Jun 2021
Commented: work wolf on 11 Jun 2021
t=0:0.1:1;
v=0.2;
fun1=@(s,t) s .* exp(-s).* ( (t-s) .^(v-1) ) ;
%gex= @(t) arrayfun(@(t) integral (@(s) fun1(s,t) ,0,t), t);
if t==0
gex= @(t) 0;
else
gex= @(t) arrayfun(@(t) integral (@(s) fun1(s,t) ,0,t), t);
end
How do I exclude input
t=0
and make it into a new value inside the matrix namely, gex, i.e, gives
gex(t)
as one matrix and set the value of
gex(t(1))=0
in same time?

Accepted Answer

David Hill
David Hill on 10 Jun 2021
I am doing a little guessing. I assume you want to integrate with respect to s (0,t) then look at t from 0:0.1:1.
syms s t
v=0.2;
fun=s*exp(-s)*(t-s)^(v-1);
fun1=int(fun,s,0,t);
n=0:.1:1;
for k=1:length(n)
b(k)=vpa(subs(fun1,t,n(k)));
end
  3 Comments
work wolf
work wolf on 11 Jun 2021
Thanks, do you have another idea to exclude zero, i.e output NaN, as anonymous function?
The problem when substitution zero, gives NaN. That is, (t-s).^(v-1) gives (t-s).^(-0.8). So, i am thinking to make two anonymous function, the first, t>0 and another t==0.

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More Answers (1)

Kapil Gupta
Kapil Gupta on 10 Jun 2021
I assume you want to know how you can use integral function as anonymous function. The following MATLAB Answers link has a similar query, you can check this out:

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