MATLAB: Bode Plot Axis Change

bodeplot axis

Hello Im trying to learn the bode plot tool
Here is what i have
Here is my tf function Am i inputting it correct? The plot is not correct (.001*S)/(.0000005S^2 + .0017*s +1)
num = [.001];
denom = [ .0000005, .0017, 1];
g = tf(num, denom);
bode(g),grid
I get a nice bode plot from this however the max magnitude is not where its suppose to be on the plot. It is self scaling to -60dB I need to change the scale somehow to see what is going on at -4 dB for example.
Can someone help please?

Best Answer

All, i figured out my issue and maybe this will help someone in the future.
My numerator has the highest power of S as the 1st power. You must include all the powers of S all the way down to S to the zero power. There for the numerator vector must have a zero for the second component This solved my issue and the scaling is now correct also
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