Query regarding Quiver plot

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Vijayakumar Pachigolla
Vijayakumar Pachigolla on 15 Jun 2022
Dear all,
I have data (distance, frequency, arrow amplitude and direction) at several stations along a profile. I want to make induction arrows pseudosection (Distance vs frequency and corresponding arrow behaviour). I used quiver command in matlab. Here, my y axis in log scale and x axis is normal. I am unable get arrows in a proper manner. Kindly guide me.
Thanking you

Answers (1)

KSSV on 15 Jun 2022
Get the components first and then use quiver.
u = amplitude.*cos(direction) ; % be cautious of units of direction/ angle
v = amplitude.*sin(direction) ;
quiver(distance, frequency, u,v)
  1 Comment
Vijayakumar Pachigolla
Vijayakumar Pachigolla on 15 Jun 2022
Dear KSSV,
Thank you for your quick response.
I have already used in the following way
u = AmpliR .* cos(thetaR);
v = AmpliR .* sin(thetaR);
set(gca,'YTick', [0.001,0.01,0.1,1,10^1,10^2,10^3,10^4,10^5]);
My frequency is in log scale. But, I am unable to get log scale. If I use 'Y scale' in log. the following error is coming.
Warning: Error updating Quiver.
DataSpace or ColorSpace transform method failed.
Kindly help me in this regard.
Thanking you

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