Plotting 3D points from numerous arrays
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Konstantinos Belivanis
am 7 Nov. 2014
Beantwortet: Daniel Iyinomen
am 7 Jun. 2018
Hello all,
I have 210 arrays each one representing the x,y,z coordinates of a point (70 points). My arrays are named Point_1_x, Point_1_y, Point_1_z, etc.
I want to plot a 3D plot of the 70 points at a specific time (assume 20,1 cell in all arrays.
Is there a way to write a loop for the whole procedure with i ranging from 1 to 70 to create this plot as automatically as possible?
Thank you in advance.
1 Kommentar
Akzeptierte Antwort
Konstantinos Belivanis
am 7 Nov. 2014
4 Kommentare
Orion
am 7 Nov. 2014
this should work
t=20;
% init
X_Coords = zeros(70,1);
Y_Coords = zeros(70,1);
Z_Coords = zeros(70,1);
% loop on 70 files for the time t
for i=1:70
X_Coords(i) = eval(sprintf('Point_%d_x(t,1)',i));
Y_Coords(i) = eval(sprintf('Point_%d_y(t,1)',i));
Z_Coords(i) = eval(sprintf('Point_%d_z(t,1)',i));
end
% draw
plot3(X_Coords,Y_Coords,Z_Coords,'+');
Weitere Antworten (2)
Orion
am 7 Nov. 2014
I don't have data to work with and see the validity of the result, but I guess you need something like
% create array by concatenating the vectors for each directions.
% assuming all Point_1_x, Point_1_y, Point_1_z, etc. are columns vectors.
AllXdat = [];
AllYdat = [];
AllZdat = [];
for i = 1:70
AllXdat = [AllXdat eval(sprintf('Point_%d_x',i))];
AllYdat = [AllYdat eval(sprintf('Point_%d_y',i))];
AllZdat = [AllZdat eval(sprintf('Point_%d_z',i))];
end
% define the time you want to plot, and get the corresponding spatial values,
% assuming the value fot t = 20 is at the 20th position in the vectors : Point_1_x(20),...
mytime = 20;
XatTime = AllXdat(mytime,:);
YatTime = AllYdat(mytime,:);
ZatTime = AllZdat(mytime,:);
% plot at the desired time
plot3(XatTime,YatTime,ZatTime);
Daniel Iyinomen
am 7 Jun. 2018
How can I use Surf to plot 3D graph from a text file. The text is attached and the auto-generated surface is also attached. My problem is drawing the attached auto-generated plot in MATLAB using the attached text file. Please, any help?
0 Kommentare
Siehe auch
Kategorien
Mehr zu Annotations finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!