How to show dot graph in specific range

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Phudit Kanittasut 2021-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/779212-how-to-show-dot-graph-in-specific-range

评论： Star Strider 2021-3-21

采纳的回答： Star Strider

How can I show the dot that occour above 1

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Star Strider 2021-3-21

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在 MATLAB Online 中打开

I am not certain what you want.

Adapt this to your data:

x = linspace(0, 7200, 250);                                 % Create ‘x’
y = rand(size(x))*4.5E+4;                                   % Create ‘y’
figure
plot(x, y, 'r.')
hold on
Lv = y>1E+4;                                                % Set Threshold At 1E+4
plot(x(Lv), y(Lv), '.b')
hold off
legend('All Data', 'Data Above Threshold')

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Phudit Kanittasut 2021-3-21

This is my code and my data

Star Strider 2021-3-21

在 MATLAB Online 中打开

All the ‘pks’ values are greater than 1, and range from 102 to 45448:

pure_liver = readmatrix('Pure Liver Spectra.csv');
[pks,locs] = findpeaks(pure_liver(:,2));  
x = 1:size(pure_liver,1);
[pks_min,pks_max] = bounds(pks)                                         % Minimum & Maximum Values Of ‘pks’
figure
Lv = pure_liver(locs,2)>1E+4;                                           % Set Threshold = 1E+4
% Lv = pure_liver(locs,2)>1;                                              % Set Threshold = 1
plot(x(locs(Lv)), pure_liver(locs(Lv),2), '.r')
grid
title('Pure Liver peak');