I want to give a condition to the values of the x vector , i tried to dosomething but i didnt have teh results i wanted. helpp please

w = 0.1;
h = 0.1;
L = 8.0;
E = 210.0E9;
F = 3000.0;
a = L/4;
x = linspace(0,8,100)
I = (w*h^3)/12;%Calculate variable I
R = (F/L)*(L-a);% calculate varibale R
o = ((F*a)/(6*E*I*L))*(2*L-a)*(L-a);% calculate variable o
if (x>a)
    y = (-o*x)+(R*(x.^3)/6*E*I)-(F/6*E*I)*(x-a).^3;
else
    y = (-o*x)+(R*(x.^3)/6*E*I)-(F/6*E*I)*(0);
    endif

Answer 1

[KSSV]

w = 0.1;
h = 0.1;
L = 8.0;
E = 210.0E9;
F = 3000.0;
a = L/4;
x = linspace(0,8,100) ;
I = (w*h^3)/12;%Calculate variable I
R = (F/L)*(L-a);% calculate varibale R
o = ((F*a)/(6*E*I*L))*(2*L-a)*(L-a);% calculate variable o

y = (-o*x)+(R*(x.^3)/6*E*I)-(F/6*E*I)*(0);  
idx = x > a ; 
y(idx) = (-o*x(idx))+(R*(x(idx).^3)/6*E*I)-(F/6*E*I)*(x(idx)-a).^3

y = 1×100

1.0e+11 * 0 0.0000 0.0000 0.0001 0.0002 0.0004 0.0007 0.0012 0.0018 0.0025 0.0035 0.0046 0.0060 0.0076 0.0095 0.0117 0.0142 0.0170 0.0202 0.0238 0.0277 0.0321 0.0369 0.0421 0.0479 0.0541 0.0609 0.0681 0.0759 0.0841

With loop. Which can be avoided.

w = 0.1;
h = 0.1;
L = 8.0;
E = 210.0E9;
F = 3000.0;
a = L/4;
x = linspace(0,8,100) ;
I = (w*h^3)/12;%Calculate variable I
R = (F/L)*(L-a);% calculate varibale R
o = ((F*a)/(6*E*I*L))*(2*L-a)*(L-a);% calculate variable o
y = zeros(size(x)) ;
for i = 1:length(x)
    if (x(i)>a)
        y(i) = (-o*x(i))+(R*(x(i).^3)/6*E*I)-(F/6*E*I)*(x(i)-a).^3;
    else
        y(i) = (-o*x(i))+(R*(x(i).^3)/6*E*I)-(F/6*E*I)*(0);
    end
end
y

y = 1×100

1.0e+11 * 0 0.0000 0.0000 0.0001 0.0002 0.0004 0.0007 0.0012 0.0018 0.0025 0.0035 0.0046 0.0060 0.0076 0.0095 0.0117 0.0142 0.0170 0.0202 0.0238 0.0277 0.0321 0.0369 0.0421 0.0479 0.0541 0.0609 0.0681 0.0759 0.0841

[mathiua]

didn't work:(

[Torsten]

As you can see, both solutions work.

[mathiua]

you are right, im sorry it was problem with the rest of my code, thank you!!