How to apply function in vector form variable?

Hi guys, I want to modify below codes.

In respect to every value of T, I want to apply below logic. T is N by 1 matrix. (ex: T = [ -1 2 0 1 0 3 -3 5 ... 0 ]' )

function f1 = function_1(T)

if T <= 0

function_1 = T*T ;

elseif ( 0< T ) && ( 1 <T)

function_1 = T + 2 ;

else (T >= 1)

function_2 = T + 3 ;

The thing is that if I run that code, conditional statement does not work. How can I modify it?

Thanks in advance:D

Answer 1

[Matt J]

You should be using logical indexing expressions, like in the following.

 function  S = function_1(T)

      S=nan(size(T)); %pre-allocate

   cond1= T<0;
   S(cond1)=T(cond1).^2;

   cond2=T>0 & T<1;
   S(cond2)=T(cond2)+2;

   etc...

[Jinsu Kim]

Thanks. It really works !!