How can extract data in scatter plot??

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Hi all

I have two catgories of data that have between 0-1. I plotted these data in scatter form. Now I want to extract the range of data in the X-axis with length 0.01 and find Y value corresponding to x value.

please help me.

thanks.

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Scott MacKenzie 2021-7-24

What do you mean by I want to extract the range of data in the X-axis with length 0.01? A range has two values, not one.

Also, it would help if you post your data and code.

MOzhdeh Salimi 2021-7-24

Yes, i want to classification my data to classes with 0.01 length. For example: Class1: 0-0.0.1 Class2:0.0.1-0.0.2 . . . And then find corresponding y value to these class.

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Answer 1

Scott MacKenzie 2021-7-24

在 MATLAB Online 中打开

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% test data
x = rand(1, 100);
y = rand(1, 100);
% find elements for class 1 (x is between 0 and 0.1)
idx = find(x >= 0 & x < 0.1);
xClass1 = x(idx);
yClass1 = y(idx);
% output data for 1st class (just for demo)
[xClass1' yClass1']
ans = 7×2
    0.0656    0.9182
    0.0330    0.5282
    0.0287    0.0501
    0.0358    0.3897
    0.0360    0.6975
    0.0660    0.8916
    0.0480    0.2643
% repeat for other classes or setup in a loop

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MOzhdeh Salimi 2021-7-24

thank you .

But my data are double and this code have erorr.

this is my code:

% read image and fit regression line%

VF = imread('Vf.tif');

Tnormal= imread('Tnormmsh.tif');

[i,j]=size(VF);

length=i*j;

X=VF(1:length);

Y=Tnormal(1:length);

Minx=min(X);

Maxx=max(X);

for X=Minx:0.01:Maxx

a=X

end

MOzhdeh Salimi 2021-7-24

your answer is completely true.

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How can extract data in scatter plot??

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