Is there a way to get the numerical values corresponding to a particular section of a histogram?

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Teshan Rezel 2020-5-27

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评论： Sai Sri Pathuri 2020-5-29

Hi folks,

I'm trying to threshold an image based on a histogram, but I need to eliminate all but a certain part of the histogram. I've attached an image below, with the highlighted part being an example of one I'm interested in. Is there a way to do this?

Thanks in advance

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Answer 1

Sai Sri Pathuri 2020-5-29

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https://ww2.mathworks.cn/matlabcentral/answers/534778-is-there-a-way-to-get-the-numerical-values-corresponding-to-a-particular-section-of-a-histogram#answer_442011

编辑：Sai Sri Pathuri 2020-5-29

You may use Data Brushing. After plotting above graph,

Go to Tools and select Brush
On the plot, select the desired area and right click on it
Choose 'Remove unbrushed data'

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Teshan Rezel 2020-5-29

Hi Sai, thanks for this! Is there a way to automate this process for a generalised graph, if I know that the points of interest are points of inflection?

Sai Sri Pathuri 2020-5-29

Following answer may help

https://www.mathworks.com/matlabcentral/answers/383721-how-to-find-inflection-point-please-help

You may also search for 'how to find points of inflection on a graph in matlab'. There are a good number of answers which may help.

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Is there a way to get the numerical values corresponding to a particular section of a histogram?

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Is there a way to get the numerical values corresponding to a particular section of a histogram?

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