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Can anyone help me to understand the logic of below code

Asked by VANDANA GUPTA on 27 Jun 2019
Latest activity Commented on by Jan
on 8 Jul 2019
Xb=Xm; Yb=Ym; Zb=Zm; % Boundary Points
Xf=[];Yf=[];Zf=[];
for z=min(Zb):1:max(Zb)+0.5
x1=Xb(abs(Zb-z)<0.01);y1=Yb(abs(Zb-z)<0.01);z1=Zb(abs(Zb-z)<0.01);
for y=min(y1):1:max(y1)+0.5
x2=x1(abs(y1-y)<0.01);y2=y1(abs(y1-y)<0.01);z2=z1(abs(y1-y)<0.01);
xf=x2(abs(x2-min(x2))<0.01); yf=y2(abs(x2-min(x2))<0.01);zf=z2(abs(x2-min(x2))<0.01);
Xf=[Xf;xf];Yf=[Yf;yf];Zf=[Zf;zf];
end
end
range of Xb = 12.75 to 26.75
range of Yb = -10 to 10
range of Zb = -10 to 10

  6 Comments

sir this is the full code...
sir, i want to understand this portion of this code:
% find the points in the front surface
for z=min(Zb):1:max(Zb)+0.5
x1=Xb(abs(Zb-z)<0.01);
y1=Yb(abs(Zb-z)<0.01);
z1=Zb(abs(Zb-z)<0.01);
for y=min(y1):1:max(y1)+0.5
x2=x1(abs(y1-y)<0.01);
y2=y1(abs(y1-y)<0.01);
z2=z1(abs(y1-y)<0.01);
xf=x2(abs(x2-min(x2))<0.01);
yf=y2(abs(x2-min(x2))<0.01);
zf=z2(abs(x2-min(x2))<0.01);
Xf=[Xf; xf]; Yf=[Yf; yf]; Zf=[Zf; zf];
end
end
It calculates some stuff. Now, since you still haven't told us what the overall purpose of the code is, I doubt anybody is going to bother looking any deeper. Well written code would have comment explaining what the variables are (and have better variable names) and comments explaining what's going on. This hasn't
I suggest that if you need help understanding the code, you ask whoever wrote it.
Oh, and please use the toolbar to format the code as code. It's the insert_code_16.png button.

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1 Answer

Answer by Jan
on 1 Jul 2019

Start with a simplification of the code to make it easier to read:
% find the points in the front surface
for z = min(Zb):max(Zb) + 0.5
% Get x, y, z values of points near to Zb==z:
index = (abs(Zb - z) < 0.01);
x1 = Xb(index);
y1 = Yb(index);
z1 = Zb(index);
for y = min(y1):max(y1) + 0.5
% Get x1, y1, z1 values of points near to y1==y:
index = (abs(y1-y) < 0.01);
x2 = x1(index);
y2 = y1(index);
z2 = z1(index);
% Get x2, y2, z2 values of points near to y2==min(x2):
index = (abs(x2-min(x2)) < 0.01);
xf = x2(index);
yf = y2(index);
zf = z2(index);
% Collect the xf, yf, zf values:
Xf = [Xf; xf];
Yf = [Yf; yf];
Zf = [Zf; zf];
end
end

  2 Comments

ok, sir.......sir in the code of front surface, is vector size reduced of Xb,Yb and Zb upto x2, y2 and z2....and in xf, yf and zf, surface is getting
@VANDANA GUPTA: So do you have a specific question about the code?

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