How i extract the components of a vector/matrix output ?

For example i have a function like a=polyfit(x,y,1) and the result is

a= 0.300 1.00

How can i extract a(1)=0.300 and a(2)=1.00?Thank you

Answer 1

[Ameer Hamza]

Yes, that is the syntax. a(1) and a(2)

a=polyfit(x,y,1);
first_element = a(1);
second_element = a(2);

Read about indexing here: https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html

[Antonia Mocan]

I have tried...but unfortunately it doesn't work..

[Ameer Hamza]

What is the error?

[Antonia Mocan]

i don't have any errors,but it doesn't show..

I want to display like an equation the coeff from p : b=0.7*x+1

[Ameer Hamza]

You are just assigning the string to a variable, not printing it in command window. You need to use fprintf() or disp(). For example, use the following line

fprintf('b=%.2f*x+%.2f\n', p)

or

disp("b="+p(1)+"*x"+p(2))

[Antonia Mocan]

thank you very much!!

[Ameer Hamza]

I am glad to be of help!