Why do i need to use .^ notation ?

2 views (last 30 days)
Why do i need to use the .^ notation ? Is there any other way around it ?
% This is my function.
function y = PBTask4P1_f(x)
y = 4.2*x.^4-5*x.^3-7*x;
plot(x,y);
xlabel('INPUT X')
ylabel('OUTPUT Y')
end

Accepted Answer

KALYAN ACHARJYA
KALYAN ACHARJYA on 3 Apr 2021
Edited: KALYAN ACHARJYA on 3 Apr 2021
It's based on equation. .^ represent the element wise to the power of any array/vector.
See the example
a =
1 2 3 4 5 6
>> a.^2
ans =
1 4 9 16 25 36
Whereas a^2=a*a (Matrix Multiplication)
  2 Comments
Yash Shil Balgobin
Yash Shil Balgobin on 3 Apr 2021
But the above equation is not an array, is it ? If i remove the dots for y = 4.2*x^4-5*x^3-7*x;, the function fails.
Yash Shil Balgobin
Yash Shil Balgobin on 3 Apr 2021
@KALYAN ACHARJYA Thank you so much for the edit. It all makes sense now.

Sign in to comment.

More Answers (0)

Categories

Find more on Programming in Help Center and File Exchange

Products


Release

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!