Find the average curve of multiple plots from different Excel files

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Carla Baceanu
Carla Baceanu 2017-7-14
评论： Carla Baceanu 2017-7-17
I have multiple excel files each having 2 columns, all numerical values. I have managed to make a plot which has all the lines superimposed, without actually extracting separate variables in the workspace. But now I need to find a line that is an average of all the other lines, and I can't figure it out. Might be more difficult since I don't have the variables extracted. This is the code. Thank you in advance!
Files = dir('E:\...');
N = length(Files);
for i = 3:N
m = sprintf('%s', Files(i,1).name);
Frequency = xlsread(m,'A:A');
Density = xlsread(m,'B:B');
plot(Density,Frequency)
hold on
xlabel('Density')
ylabel('Frequency')
xlim([0 1.4]);
ylim([0 7000]);
end

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采纳的回答

Sruthi Geetha
Sruthi Geetha 2017-7-17
You can find the sum of the frequency and density values for each file and then divide by N to get the mean of frequency and density respectively. Then plot them. It would look something like this:|
endFiles = dir('E:\...');
N = length(Files);
f = 0;
d = 0;
for i = 3:N
m = sprintf('%s', Files(i,1).name);
Frequency = xlsread(m,'A:A');
Density = xlsread(m,'B:B');
f = f + xlsread(m,'A:A');
d = d + xlsread(m,'B:B');
plot(Density,Frequency)
hold on
xlabel('Density')
ylabel('Frequency')
xlim([0 1.4]);
ylim([0 7000]);
end
fmean = f/N;
dmean = d/N;
plot(fmean,dmean);
hold off
  1 个评论
Carla Baceanu
Carla Baceanu 2017-7-17
Thank you, I follow the logic! How can I fix the problem if the number of rows are different? Files have different matrix sizes, and there is an error "matrix dimensions must agree"
f = f + xlsread(m,'A:A');
d = d + xlsread(m,'B:B');

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