where is the error? lagrange

when i execute this code, error comes in y^lag;

how can i fix it?

function approx = lagrange(x,y,x_bar)

n = length(x);

for i = 1:n

value = ones(1,length(x_bar));

for k = 1 : n

if k ~= i

value = value.^(x_bar-x(k))/(x(i)-x(k));

end

end

lag (i,:) = value ;

end

approx = y^lag;

end

Answer 1

[Ameer Hamza]

Use element-wise exponential operator

approx = y.^lag;