How to: Merging multiple graph lines
21 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello Guys,
my problem is that I have several data sets of different x-Arrays and always the same y-Array. Basically my plot functions looks like this: plot(x1,y,'g',x2,y,'b'....)
As I have drawn in the picture I want to merge all the lines as to always keep the lowest y-values going from left to right in terms of x-values. This should creat one single new plot that looks like the black line in the right picture. The left picture demonstrates the overlapping data sets.
Can I solve this problem graphically, e.g. using a plotting function to always display the lowest y-value or do I need to create a new 2D array that always picks the lowest y-value for every x- value? Maybe you can give me a base to start from. Sorry about my "untechnical" explanation, Im new to Matlab and coding in general.
Thanks in advance for your support. Pat
2 commentaires
Guillaume
le 18 Oct 2014
It looks like you meant to attach or (better) embed a figure, but seems like you forgot
Réponse acceptée
Guillaume
le 20 Oct 2014
Modifié(e) : Guillaume
le 20 Oct 2014
I would concatenate all your x, get the unique values and their position and use the position with accumarray to get the minimum of y:
xall = [x1 x2 x3 ...];
[x, ~, indices] = unique(xall);
y = accumarray(indices, repmat(y, 1, N)', [], @min); %where N is the number of xi
plot(x, y);
edited for missing comma
10 commentaires
Plus de réponses (1)
Rick Rosson
le 18 Oct 2014
x = [ x1 x2 x3 ... ];
N = length(x)/length(y);
y = repmat(y,1,N);
plot(x,y);
2 commentaires
vi trung kien
le 21 Mar 2018
Modifié(e) : vi trung kien
le 21 Mar 2018
Dear Patrick, Can you suggest for me how to get one single united line that always displays Ymin(n), like you have scratched in the pictures attached.My problem the same as you before. Thanks for your help.
Voir également
Catégories
En savoir plus sur Formatting and Annotation dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!