How can I display the second derive of a vector ,?
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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
2 Comments
Jan
on 27 Jun 2018
What exactly is the problem? Importing the file, extracting the 2nd column or using gradient twice?
Accepted Answer
More Answers (1)
Mark Saad
on 27 Jun 2018
Edited: Mark Saad
on 27 Jun 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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