How to find the X- and Y- axis interecpt of this plot in Matlab?

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Ved 2013-11-19

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https://ww2.mathworks.cn/matlabcentral/answers/106713-how-to-find-the-x-and-y-axis-interecpt-of-this-plot-in-matlab

回答： Walter Roberson 2013-11-19

Please consider this sample code:

 a=2.3;b=5.3; % constants
 n=1000;  % number of data blocks
 data=a+(b-a)*rand(1,3500); % data points
 count=0;
 x=[1:.1:7]; % x-axis
 bins=hist(data,x);
 for i=length(x):-1:1
     count=count+bins(i);
     ccdf(i)=count/n;
 end
 semilogy(x,ccdf) % CCDF of data

My question is that if we could find and mark the Y-axis intercept.

I can use the * Data Marker * option in Matlab Figure to mark the X & Y axis values but is there any other way to do so?

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Answer 1

Walter Roberson 2013-11-19

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The Y axis intercept of a log plot... so in other words the place where the y data would equal 1 ?

If so then because y represents the cumulative distribution, y would be 1 at the right hand edge of the distribution, the end-point of where the distribution becomes defined. Which would be "b" in your code.