The values from the for loop won't store on the array
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When running this piece of code, pendiente(i) will display the values, but when I exit the loop the array shows up as empty. What am I doing wrong?
for i = 1 : length(epsilon_l_embuticion)-2
pendiente(i) = (sigma_mpa_embuticion(i+1)-sigma_mpa_embuticion(i))/(epsilon_l_embuticion(i+1)-epsilon_l_embuticion(i));
pendiente(i)
end
pendiente
5 个评论
Dyuman Joshi
2023-10-26
Please share the full code you are working with.
Seems to work fine:
epsilon_l_embuticion = [1 3 5 7 NaN]; % last element unused
sigma_mpa_embuticion = [1 3 6 10 NaN]; % last element unused
for i = 1 : length(epsilon_l_embuticion)-2
pendiente(i) = (sigma_mpa_embuticion(i+1)-sigma_mpa_embuticion(i))/(epsilon_l_embuticion(i+1)-epsilon_l_embuticion(i));
pendiente(i)
end
pendiente
Imanol Fernandez de arroyabe Zabala
2023-10-26
编辑：Torsten
2023-10-26
Torsten
2023-10-26
Except for some Inf values in "pendiente", everything works out fine (see above).
I have ran your code here, just to show that the result is not empty, but instead of importdata(), use readmatrix or readtable or readcell, as they are more robust functions.
There is a big disparity in the (absolute) values of output, from the order of 10^2 to 10^13, thus smaler values might "appear" to be zero or "empty", but they are not.
B = importdata("Acero_embuticion.txt")
sigma_mpa_embuticion = B.data(:, 1);
epsilon_l_embuticion = B.data(:, 2);
epsilon_t_embuticion = B.data(:, 3);
for i = 1 : length(epsilon_l_embuticion)-2
pendiente(i) = (sigma_mpa_embuticion(i+1)-sigma_mpa_embuticion(i))/(epsilon_l_embuticion(i+1)-epsilon_l_embuticion(i));
%pendiente(i)
end
format shortg
disp(pendiente.')
回答（1 个）
You can display/write out the calculated data, and store or write to an external files as well. See how it can be done:
A = readmatrix("Fundicion_gris.txt");
B = readmatrix("Acero_embuticion.txt");
sigma_mpa_embuticion = B(:, 1);
epsilon_l_embuticion = B(:, 2);
epsilon_t_embuticion = B(:, 3);
for i = 1 : length(epsilon_l_embuticion)-2
pendiente(i) = (sigma_mpa_embuticion(i+1)-sigma_mpa_embuticion(i))/(epsilon_l_embuticion(i+1)-epsilon_l_embuticion(i));
end
% The calculated data is stored/written into an external file called: Out_pendiente.txt
writematrix(transpose(pendiente), 'Out_pendiente.txt')
fprintf('ALL calculated data = pendiente : \n');
fprintf('%3.5f \n', transpose(pendiente))
% An alternative way of storing the data is to use save()
save('Out_pendiente2.mat', pendiente)
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2023-10-26
2023-10-26
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