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There is colormap inconsistency in my graph for the code attatched.

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KM
KM 2023-4-27
编辑： KM 2023-5-5
Hi,
I used a package arrow3D. Here, I want the colormap on arrow to change with the variation in z-axis.
IANd since deltaV(3) is the z-direction. I tried passing it as
arrow3D(pos,deltaV,deltaV(3))
but it's not helping.
Thanks

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回答（1 个）

alexander Mcghee
alexander Mcghee 2023-4-27
编辑：alexander Mcghee 2023-4-27
normalize the z-direction values between 0 and 1 so that they can be properly used to index the colormap.
pos = postot(ii,:)-.5*deltaV;
% Normalize the z-direction value between 0 and 1
z_norm = (deltaV(3) - min(deltaV0(3))) / (max(deltaV0(3)) - min(deltaV0(3)));
% Get the color from the colormap based on the normalized z-direction value
colorCode = colormap(jet(64));
arrowColor = colorCode(round(z_norm * 63) + 1, :);
arrow3D(pos, deltaV, arrowColor)
  1 个评论
KM
KM 2023-4-27
编辑：KM 2023-4-28
@alexander Mcghee Thank you so much fo the response. I did try that as,
Normalize the z-direction value between 0 and 1
min_z = min(deltaV0(3));
max_z = max(deltaV0(3));
if deltaV(3) <= min_z
z_norm = 0;
elseif deltaV(3) >= max_z
z_norm = 1;
else
z_norm = (deltaV(3) - min_z) / (max_z - min_z);
end
% Get the color from the colormap based on the normalized z-direction value
colorCode = colormap(jet(64));
arrowColor = colorCode(round(z_norm * 63) + 1, :);
But the colour code is not working properly and sometimes giving an script index error. Could you please cross check.

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