Using a Nested For Loop with input from an Array to Create an Array
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Hello all,
I am trying to use the code seen below to output an array titled as "Fatigue_Life" when the function of "mancof" changes from positive to negative. The input of j should be for each variable in the "de" array and the output should be an array for the value of i at which the "mancof" function becomes negative. The output array should be the exact same dimension as the input array. For example, de(1,1)=0.00486 should result in Fatigue_Life(1,1)=72 and so on until the array has been fully calculated. The code currently runs but I can not seem to get the output matrix as described above it seems to just be taking the last value? I created the input array "de" of all the same values for simplicity so the output array should also be of the same value, known to be 72. I hope what I would like to happen is clear. Please see the code below, any help will be greatly appreciated.
MATLAB Code:
clc
clear
E=75657;
ef=.057429;
sf=227.365;
b=-0.0787879;
c=-0.6060601;
t=.00486;
de= t.*ones(1,100);
mancof=(sf/E*(2*i)^b)+(ef*(2*i)^c)-de;
Fatigue_Life=0;
for i=1:length(de)
for j=de(:,i)
if mancof>0
mancof=(sf/E*(2*i)^b)+(ef*(2*i)^c)-j;
Fatigue_Life=i
elseif mancof<0
fprintf('The Fatigue Life is: \n', Fatigue_Life)
end
end
end
0 Comments
Accepted Answer
Andrei Bobrov
on 26 Apr 2013
Edited: Andrei Bobrov
on 26 Apr 2013
ii = (1:100)';
mancof = sf/E*(2*ii).^b + ef*(2*ii).^c - t;
Fatigue_Life = find(mancof > 0);
ADD after Luke's comment
ii = (1:100)';
t = .00485 + .001*rand(30,1); % eg
mancof = bsxfun(@gt, sf/E*(2*ii).^b + ef*(2*ii).^c, t(:)');
[i1,j1] = find(mancof);
Fatigue_Life = [i1,j1];
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