# Multiple inputs/outputs of a function

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Kyle Langford on 10 Mar 2021
Commented: Kyle Langford on 12 Mar 2021
I have my function defined as:
function [x,y] = get_y(x)
if x<-1;
y=exp(x+1);
else
if (-1<x & x<5);
y=2+cos(pi*x);
else x>=5;
y=10*(x-5)+1;
end
end
end
when I individually run x=-2 or x=8, I get the correct answer.
When i run x=[-2,8], it only gives me answers based on the 3rd parameter. How do I get the correct output parameterized by the input?

ANKUR KUMAR on 10 Mar 2021
Edited: ANKUR KUMAR on 10 Mar 2021
You can use the same function which you provided, and use loop while calling the function, or you can modify the function to give output as per your input.
IDEA 1: Using the same code which you provided:
Calling the function:
input_array=[-2,8];
for index=1:length(input_array)
[a(index),b(index)]=get_y(input_array(index));
end
a
b
Function:
function [x,y] = get_y(x)
if x<-1;
y=exp(x+1);
else
if (-1<x & x<5);
y=2+cos(pi*x);
else x>=5;
y=10*(x-5)+1;
end
end
end
IDEA 2: You can prefer to nodify the function itself.
Calling the function:
xx
yy
Function:
for index=1:length(input_array)
x=input_array(index);
if x<-1;
y=exp(x+1);
else
if (-1<x & x<5);
y=2+cos(pi*x);
else x>=5;
y=10*(x-5)+1;
end
end
x_array(index)=x;
y_array(index)=y;
end
end
Kyle Langford on 12 Mar 2021
Awesome, thank you! I like how the first one turned out. I was getting really frustrated trying to get the code smoothed out.