How can I keep row from index number

2 次查看（过去 30 天）
Phudit Kanittasut
回答： Image Analyst 2021-5-1
clear
Data = readmatrix('Pure Brain Spectra.csv');
rows=length(Data)
cols=width(Data)
for i = 2:cols
Xlocs = Data(:,1);
Ylocs = Data(:,i);
select = [Xlocs Ylocs];
[value,index1] = findpeaks(select(:,i));
end
How can I keep the row in data with Index number from matix index1

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回答（1 个）

Image Analyst
Image Analyst 2021-5-1
There were so many errors in your code that I can't explain them all. All I'm going to do is show you how it's done.
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 18;
Data = readmatrix('Pure Brain Spectra.csv');
whos Data
[rows, columns] = size(Data)
Xlocs = Data(:, 1);
for col = 2 : columns
thisColumnY = Data(:, col);
nexttile;
plot(Xlocs, Data(:, col), 'b-');
[peakValues, indexesOfPeaks] = findpeaks(thisColumnY, 'Threshold', 1000);
grid on;
hold on
plot(Xlocs(indexesOfPeaks), peakValues, 'rv', 'LineWidth', 2, 'MarkerSize', 7);
caption = sprintf('Column %d', col);
title(caption, 'FontSize', fontSize);
drawnow;
end
hold off;
g = gcf;
g.WindowState = 'maximized'
fprintf('Done running %s.m ...\n', mfilename);
but you should really take time to understand all the options for findpeaks() because I'm not sure what you consider to be a peak or not and there are just too many of them identified if you simply go with the defaults.

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