How to: Merging multiple graph lines
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Patrick
am 18 Okt. 2014
Bearbeitet: vi trung kien
am 21 Mär. 2018
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 Kommentare
Guillaume
am 18 Okt. 2014
It looks like you meant to attach or (better) embed a figure, but seems like you forgot
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Guillaume
am 20 Okt. 2014
Bearbeitet: Guillaume
am 20 Okt. 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
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Rick Rosson
am 18 Okt. 2014
x = [ x1 x2 x3 ... ];
N = length(x)/length(y);
y = repmat(y,1,N);
plot(x,y);
2 Kommentare
vi trung kien
am 21 Mär. 2018
Bearbeitet: vi trung kien
am 21 Mär. 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.
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