MATLAB: A problem with a function

functionproblem

hi all ! i wrote this simple function
 %

function [ output_args ] = fract_int16( input_args )
if input_args<0
         output_args=round(2^16+input_args*2^15);
else
         output_args=round(input_args*2^15);
end
end
when i use it for negative number for exemple
 %
fract_int16(-0.9133)=35609
fract_int16(0.3481)=11409,
both values ARE TRUE
but when use this function in an array i get a false value
 % 
A=[-0.9133 0.3481]
fract_int16(A)=[-29927 11407]
this is wrong!!
did i make i mistake in writing this function?
thank you all

Best Answer

Try this out:
input_args = [-0.9133 0.3481];
output_args = zeros(size(input_args));
for k=1:length(input_args)
    if input_args(k)<0
             output_args(k)=round(2^16+input_args(k)*2^15);
    else
             output_args(k)=round(input_args(k)*2^15);
    end
end
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