Regarding POLYFIT function in MATLAB

Question

Parth PAtel 2011-10-3

k=1:1:100;   a=log2(k);
p2 = polyfit(k,a,2);

{which create graph for all the values and make an 2nd order equation to represent that graph}

I get the answer like this...

p2 =
    Columns 1 through 2
    -0.000645220551355   0.106511608440816
    Column 3
     2.051917442148469

I want to access all three values separately...

Does anyone know any command or function or code for that....

for example Like

       p2.1= -0.000645220551355   
       p2.2=  0.106511608440816
       p2.3=  2.051917442148469

so in the next code if I want to use just 2nd value I can write x = p2.2*3 etc.

Thanks in advance...

Answer 1

Fangjun Jiang 2011-10-3

try

p2(1)
p2(2)
p2(3)

The "Getting Started" portion of the MATLAB documentation will be helpful for you. http://www.mathworks.com/help/techdoc/learn_matlab/f2-8955.html

Parth PAtel 2011-10-3

Thank you so much...Its working and I am trying to use in code..Thanks again