How do I create a vector from a for loop with different intervals?

Hi all!

I am trying to get a vector out of this loop, but it just gives me a vector for every iteration.

Does anyone know how to solve this?

t1 = 0.6;           %[sec]
po = 100;           %[kip]
E = 3000;           %[ksi]
m = 20/386;         %[kip^2/in]
k = 36.2222;
wn = sqrt(k/m);  %[rad/sec]
T = (2*pi)/wn;   %[sec]
zeta = 0.02;
c = 2*zeta*m*wn;     % Damping constant [lb*s/in]

nstep = (6*T)/0.05;
nsteps = int16(fix(nstep))
ivalues = [1:nsteps]';
tvalues = [0:0.05:6*T]';
 
%Excitation functions 
p1 = zeros(nsteps,1);
for i = 1:length(tvalues)
if tvalues(i) < (t1/2)
p1(i) = (2*po*tvalues(i))/t1;
elseif tvalues(i) > (t1/2) & tvalues(i) < t1
p1(i) = 2*po*(1-(tvalues(i)/t1));
else 
p1(i) = 0;
end
p1(i) = p1(i)
end            % I need a 1x28 vector with the p values. 

Thank you in advance!

Josefine

[Walter Roberson]

Change

p1(i) = p1(i)

to

p1(i) = p1(i);

[Josefine Olsson]

Hi! Thanks for helping out! With the ; it give me any output tho.

[Shubham Gupta]

After the loop use "fprintf()" or "disp()" to diplay p1 vector. Or you can simply write p1 without ; to display it. semicolon (;) stops MATLAB from printng out data in command window just get a grasp when do you want MATLAB to show the results.

Answer 1

[Athul Prakash]

Hey Josefine,

Everytime MATLAB executs the line

p1(i) = p1(i)

It prints the result, which in this case is the entire vector 'p1'.

This line gets you the output during every iteration.

My suggestion is to remove this line, since it doesn't serve another purpose, and use

disp(p1);

or simply

p1

after the for loop ends.