How to calculate height from a Matlab pcolor plot?

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Sachin Nag 2017-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/338239-how-to-calculate-height-from-a-matlab-pcolor-plot

评论： Image Analyst 2017-5-2

I have a pcolor plot in Matlab in which two objects are present. I need to calculate height (basically the distance) between these two objects. (Between the yellow line and the top) I extracted the data from the pcolor plot into a matrix and summed up the values to form one single column. How can I determine the height using this column? Thanks for any pointers or hints.

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Image Analyst 2017-5-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338239-how-to-calculate-height-from-a-matlab-pcolor-plot#answer_265265

在 MATLAB Online 中打开

Look for the highest peak.

% Get average vertical profile.
verticalProfile = mean(theImage, 2);
% Find highest value and it's row number:
[meanValue, row] = max(verticalProfile);

If that doesn't work then attach your original data (not a screenshot) as a PNG file.

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Sachin Nag 2017-5-2

I still have a doubt. How does one obtain height from this? It was a bit unclear to me

Image Analyst 2017-5-2

I'm not sure what colormap you're using but if yellow is the highest value, then row is the row of the bright straight yellow line at 0.5. Using that plus the scale you used to put the axis in pcolor, you can find the height.

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