Why symbolic variable usage takes time in matlab? How to remove it?

Asked Aug 26 '13 at 06:20

Active Aug 26 '13 at 10:50

Viewed 71 times

I have the following code.

syms x y; % line 1

%solve them for the parabola equation
 A  = [ x^2 x y 1 ;x0^2 x0 y0 1; x1^2 x1 y1 1; x2^2 x2 y2 1];  %line 2
 S = solve(det(A),y); %line 3

(x1,y1), (x2,y2), (x3,y3) are integer coordinates.

The line 2 takes 0.48 seconds for 73 calls and the line 3 takes 1.5 seconds for 73 calls.

In line 2 I am only defining a matrix. Why is time so much in line 1?

Also any suggestions on decreasing the time?

Thanks

edited Aug 26 '13 at 10:50

asked Aug 26 '13 at 06:20

t0mkaka

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I almost find it more interesting that line 2 is taking 1.5 seconds lol...something seems a bit off for the timing for both lines, not just line 1 – spaderdabomb Aug 26 '13 at 08:26
Sorry, but I mistakenly written wrong line number. Corrected it. – t0mkaka Aug 26 '13 at 10:51
@t0mkaka Why are you repeating line #2 73 times? – Eitan T Aug 26 '13 at 11:32
Its in a for loop. I am writing code for the randomized hough transform. – t0mkaka Aug 27 '13 at 04:29

Why symbolic variable usage takes time in matlab? How to remove it?

0 Answers0