Topic: Complex numbers

Hi.

I have some difficulties with a certain function:

20*log(abs(64935)/(64935+((1*i)*x)))

When I type this into Graph it doesn't draw anything?
I've tried to multiply i with 1 and add additional parentheses, just in case, but without any luck.

I know that there's some issues with the current version and complex numbers so I've also downloaded the 4.4.2 Beta. Unfortunately without any progress.

Am I doing anything wrong?

Btw: Thank you so much for a fantastic program. It have saved me much trouble during my time at HTX ;-D

Sincerely
Christoffer

Re: Complex numbers

You are probably trying to plot the function f(x)=20*log(abs(64935)/(64935+((1*i)*x))), but as the y-axis is real it cannot show functions with an imaginary part. Instead you probably want to show the real part on the x-axis and the imaginary part on the y-axis. You can do this using a parametric function:

x(t)=re(20*log(abs(64935)/(64935+i*t)))
y(t)=im(20*log(abs(64935)/(64935+i*t)))

Remember that you need to enable Calculate with complex numbers in the Edit|Axes dialog. It looks like you also need to zoom in to see the function. You can for example use Zoom|Fit.