how do i plot certain columns and rows of a matrix

6 vues (au cours des 30 derniers jours)
Praneeth K V
Praneeth K V le 22 Avr 2017
Commenté : Image Analyst le 23 Avr 2017
i have a matrix of 40*7 and I need to plot columns of only 3rd and 6th. How do I do it?
  1 commentaire
Praneeth K V
Praneeth K V le 22 Avr 2017
Sorry, I had put my question wrong. I have to plot a line using x and y coordinates of 2 points which are in different columns, how do I do that

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Réponses (2)

KSSV
KSSV le 22 Avr 2017
A = rand(40,7) ;
figure
hold on
plot(A(:,6),'r')
plot(A(:,7),'b')
legend('6th column', '7th column');
  1 commentaire
Image Analyst
Image Analyst le 22 Avr 2017
Replace 7 with 3 to get "only 3rd and 6th" columns.

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Image Analyst
Image Analyst le 22 Avr 2017
Try this
line([x1, x2], [y1, y2], 'Color', 'b', 'LineWidth', 2);
where the x1 and y1 come from one column, and the x2 and y2 come from the second column. If that doesn't work, then post your data sand indicate which elements of the array you want a line drawn between.
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Praneeth K V
Praneeth K V le 23 Avr 2017
Modifié(e) : Praneeth K V le 23 Avr 2017
line([x0(Elem(i,3)),x0(Elem(i,6))], [y0(Elem(i,3)),y0(Elem(i,6))],'Color','b','LineWidth','2'); this is the code i wrote.
ps: Im using loop to create multiple lines and 'i' is the variable parameter
x0 is column matrix and y0 is other column matrix. to create a line im selecting points from x0 and y0 with reference of Elem matrix but this shows error of "Error using line While setting property 'LineWidth' of class 'Line': Value not a numeric scalar"
Image Analyst
Image Analyst le 23 Avr 2017
Did you see where it said the LineWidth was not a scalar and how you were passing it a string? I said to use 'LineWidth', 2 NOT 'LineWidth', '2'. Do not put the 2 in single quotes.

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