Saving all output of for loop
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Tchilabalo
am 12 Mai 2019
Kommentiert: madhan ravi
am 16 Mai 2019
for i=1:1500
X1=J(i)-sqrt((D(i)^2)/((sqrt(A(i))+1)))
Y1=I(i)-A(i)*(J(i)-X1)
X2=J(i)+sqrt((D(i)^2)/((sqrt(A(i))+1)))
Y2=I(i)+A(i)*(X2-J(i))
end
coord=[X1(:),Y1(:),X2(:),Y2(:)]
%coord
writematrix(coord,'Coord_15.csv')
I am trying to save the coordinates (X1, X2, Y1,Y2) from a for loop as shown in the code above. All inputs (I, J, A, D) are columns vectors , but i only the last iteration is saved. I will appreciate any help.
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Akzeptierte Antwort
Sulaymon Eshkabilov
am 12 Mai 2019
Hi,
Simply add (i) after your output variables, viz. X1, Y1, X2, Y2:
for i=1:1500
X1(i)=J(i)-sqrt((D(i)^2)/((sqrt(A(i))+1)))
Y1(i)=I(i)-A(i)*(J(i)-X1)
X2(i)=J(i)+sqrt((D(i)^2)/((sqrt(A(i))+1)))
Y2(i)=I(i)+A(i)*(X2-J(i))
end
coord=[X1(:),Y1(:),X2(:),Y2(:)]
%coord
writematrix(coord,'Coord_15.csv')
Good luck
4 Kommentare
madhan ravi
am 16 Mai 2019
Bearbeitet: madhan ravi
am 16 Mai 2019
Then why did you accept the answer if it doesn’t solve the problem??
Sulaymon Eshkabilov
am 16 Mai 2019
Before commenting any point verify what you have stated. That is the correct answer. Vectorization is another solution.
Weitere Antworten (1)
madhan ravi
am 12 Mai 2019
Bearbeitet: madhan ravi
am 16 Mai 2019
You don't need a loop , this is straight forward just vectorize your code:
Note: The other answer doesn‘t show the importance of preallocation.
X1=J-sqrt((D.^2)./((sqrt(A)+1)));
Y1=I-A.*(J-X1);
X2=J+sqrt((D.^2)./((sqrt(A)+1)));
Y2=I+A.*(X2-J);
coord=[X1(:),Y1(:),X2(:),Y2(:)];
writematrix(coord,'Coord_15.csv')
2 Kommentare
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