How can I display the second derive of a vector ,?
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Mallouli Marwa
le 27 Juin 2018
Commenté : Mallouli Marwa
le 28 Juin 2018
Hello
How can I display the second derive of a vector ?
Mention that I have this table and I want to obtain the second derive of the second column of the table.
Thanks
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Jan
le 27 Juin 2018
What exactly is the problem? Importing the file, extracting the 2nd column or using gradient twice?
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Mark Saad
le 27 Juin 2018
Modifié(e) : Mark Saad
le 27 Juin 2018
You can first import it into MATLAB as an array using textread.
data = textread('essai_Al_but05_fixe_100Ohm.txt');
Then just access elements using data(i,j) where i is the row and j is the column. So if you want the second element in the third row, you do
data(3,2);
If you want the entire third row, you do
data(3,:);
Or if you want the entire second column,
data(:,2);
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