Problem with simple division like Y./X

Hi,

I am plotting X Vs Y and trying to display X vs Y./X

I am not getting a symmetric plot about the origin.

x=-1:0.001:1;
y=1.5*x+0.5;
plotyy(x,y,x,abs(y./x));

Kindly let me know the solution to the problem.

best regards

Answer 1

[Vishal Rane]

This is the plot from the data u shared.

For plotyy(a1,b1,a2,b2)

b1 vs a1 is plotted on the left side while b2 vs a2 on the right

[Raj Gupta]

The curve diverges at x=0. However, the curve (y/x) is not symmetric about the point x=0. That is y/x - curve left and right of x=0 are not same (not symmetric). I was expecting that it should be symmetric about x=0. What is the problem? Why I am not getting a symmetric curve (y/x) about x=0?

Answer 2

[Vishal Rane]

As per ur data x ranges from -1 to +1. For those x values y ranges from -1 to +2.

Since y values are not symmetric, u wont get a symmetric plot for y vs x. However the values of abs(y./x) are somewhat symmetric around 0, resulting in the symmetric plot for y vs abs(y./x).

[Raj Gupta]

Yes. I realized this. Thanks for the answer. f(x)=y/x=a+b/x which is not a symmetric function.