Hi! How I can extract specific data

10 Ansichten (letzte 30 Tage)
Aknur am 27 Feb. 2023
Kommentiert: Rik am 28 Feb. 2023
Hello everyone! Kindly ask help in clear data using indexing or other different methods. Appreciate any help
At the end I got this data and I need to write function or code which will take exactly data where the last three column in one row will be >=0 and <=3. My code is above. Please help me, I think I dont have enough knowledge to do it, but I have to do it. I really dont know how to do it. I need to use indexing but dont know how
PPP =
2.0000 1.5000 0 5.3009
4.0000 1.5000 3.0000 0.6991
5.0000 1.5000 3.4558 0
6.0000 1.5000 1.5000 3.0000
clc
clear all
close all
X0 = 1.5;
Y0 = 1.5;
Z0 = 3.0;
Theta0 = 30;
Phi0 = 90;
r = sqrt((X0 - 0)^2 + (Y0 - 0)^2 + (Z0 - 0)^2);
XBar = r * sind(Theta0) * cosd(Phi0) + X0;
YBar = r * sind(Theta0) * sind(Phi0) + Y0;
ZBar = r * cosd(Theta0) - Z0;
ThetaBar = Theta0;
PhiBar = Phi0;
fprintf('XBar: %f\n',XBar);
fprintf('YBar: %f\n',YBar);
fprintf('ZBar: %f\n',ZBar);
planes(:,:,1) = [0 3 3; 0 0 3; 0 3 0; 0 0 0; 0 0 0];
planes(:,:,2) = [0 0 3; 3 0 3; 0 0 0; 3 0 0; 0 0 0];
planes(:,:,3) = [3 0 3; 3 3 3; 3 0 0; 3 3 0; 3 0 0];
planes(:,:,4) = [3 3 3; 0 3 3; 3 3 0; 0 3 0; 0 3 3];
planes(:,:,5) = [0 3 0; 3 3 0; 0 0 0; 3 0 0; 0 0 0];
planes(:,:,6) = [0 3 3; 3 3 3; 0 0 3; 3 0 3; 0 0 3];
location_plane = 6;
asd=[];
jjj = [];
for j=1:6
j
plane = planes(:,:,j);
p0 = plane(1,:);
p1 = plane(2,:);
p2 = plane(3,:);
p3 = plane(4,:);
V0 = plane(5,:);
Ri = [X0 Y0 Z0];
Rr = [XBar YBar ZBar];
A = p0-p2;
B = p0-p3;
n=cross(A,B); % normal vector of the Plane
u = Rr-Ri;
w=Ri-V0;
D=dot(n,u);
N=-dot(n,w);
sI = N / D;
I = Ri+ sI.*u;
if any(isnan(I))==0 || any(isinf(I))==0
%any(I > 0 & I < 3, "all")
jjj = [jjj j];
asd = [asd; I];
end
fprintf('I: %f\n',I);
X=I(1);
Y=I(2);
Z=I(3);
F = sqrt((X-X0)^2 + (Y-Y0)^2 + (Z-Z0)^2);
fprintf('F: %f\n',F);
fprintf('sI: %f\n',sI);
fprintf('N: %f\n',N);
fprintf('D: %f\n',D);
fprintf('n: %f\n',n);
fprintf('X: %f\n',X);
fprintf('Y: %f\n',Y);
fprintf('Z: %f\n',Z);
p = j;
end
PPP = [jjj' asd]
if X == 0
planes(:,:,1)
ThetaBar = 90-Theta0;
fprintf('I: %f\n',I);
fprintf('plane: %f\n',j);
elseif X == 3
planes(:,:,3)
ThetaBar = 90-Theta0;
fprintf('I: %f\n',I);
fprintf('plane: %f\n',j);
elseif Y == 0
planes(:,:,2)
ThetaBar = 90 - Theta0;
fprintf('I: %f\n',I);
fprintf('plane: %f\n',j);
elseif Y == 3
planes(:,:,4)
ThetaBar = 90-Theta0;
fprintf('I: %f\n',I);
fprintf('plane: %f\n',j);
elseif Z == 0
planes(:,:,5)
ThetBar = Theta0;
fprintf('I: %f\n',I);
fprintf('plane: %f\n',j);
elseif Z == 3
planes(:,:,6)
ThetaBar = Theta0;
fprintf('I: %f\n',I);
fprintf('plane: %f\n',j);
end
1 Kommentar-1 ältere Kommentare anzeigen-1 ältere Kommentare ausblenden
Rik am 28 Feb. 2023
I recovered the removed content from the Google cache (something which anyone can do). Editing away your question is very rude. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer.

Melden Sie sich an, um zu kommentieren.

Akzeptierte Antwort

Askic V am 27 Feb. 2023
Hello Aknur,
This example code will perform task you specified.
% code which will take exactly data where the last three
% column in one row will be >=0 and <=3
A = [3 4 5 6 7 8;
1 2 5 3 1 2;
4 6 7 8 3 2;
8 9 1 0 1 2;
4 5 9 9 5 0];
% take last three columns of the matrix
B = A(:,end-2:end)
B = 5×3
6 7 8 3 1 2 8 3 2 0 1 2 9 5 0
% number of rows in B
Nr = size(B,1);
% matrix of logical values that satisfy criteria
C = B(1:Nr,:) >= 0 & B(1:Nr,:) <= 3;
% extract only those rows which all elements satisfy criteria
D = B(all(C,2),:)
D = 2×3
3 1 2 0 1 2
1 Kommentar-1 ältere Kommentare anzeigen-1 ältere Kommentare ausblenden
Aknur am 27 Feb. 2023
Hello @Askic V thank you sooooo much for crystal clear explanation, now I undersatnd with your simple example. I am so grateful for your help and explanation, no words. Thank you sooooooo much. Much much appreciate )))) Now it works and I am feel really happy that something works. Thank you again

Melden Sie sich an, um zu kommentieren.

Kategorien

Mehr zu Matrices and Arrays finden Sie in Help Center und File Exchange

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by