Find maximum of an array in a for loop?

Question

Brennan Lytle 2024-6-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2129736-find-maximum-of-an-array-in-a-for-loop

评论： dpb 2024-6-18

I need to calculate the maximum of each array from the load variable in the following for loop.

myDir = uigetdir;
myFiles = dir(fullfile(myDir,'*.txt'));
for k = 1:length(myFiles)
    baseFileName = myFiles(k).name;
    fullFileName = fullfile(myDir, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    num = readmatrix(fullFileName);
    load = num(:,1)
    ext = num(:,3)
    plot(ext,load); hold on
    grid on; 
end

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Answer 1

dpb 2024-6-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2129736-find-maximum-of-an-array-in-a-for-loop#answer_1473791

在 MATLAB Online 中打开

GENERAL GUIDANCE:

Do NOT name a variable load; it is a builtin in important MATLAB function; developing a habit of aliasing it will confuse things immeasruably when come to using .mat files.

myDir = uigetdir;
myFiles = dir(fullfile(myDir,'*.txt'));
N=length(myFiles);
MaxY=zeros(N,1);                                                % preallocate for maxima
for k = 1:N
  fullFileName = fullfile(myFiles(k).folder,myFiles(k).name);   % use the results directly...
  fprintf('Now reading %s\n', fullFileName);
  data=readmatrix(fullFileName);
  plot(data(:,1),data(:,3));
  MaxY(k)=max(data(:,3));
  if k==1, hold on; grid on; end
end