how do i jump to a previous line in a matlab program

clc
tini=[21;26;29;30;23];
x= [1,2,3,0,0;3 6 -3 tini(3) 3;0,0, -2,-7,4;0,0,8,-3,tini(4);4,-5,8,0,0];
invx= inv(x);
a= [9;-3;21;tini(4);-23];
t=invx*a;
x=t-tini;
minx = min (x)
if abs(minx)>=1 
tini=t;
% i need to go to line 4 and replace tini values with recent ones
else
  fprintf ('your final temp is\n')
  t
end

[Azzi Abdelmalek]

What is the line 4?

Answer 1

[Walter Roberson]

You cannot jump to previous lines. Use a structure such as

tini = ....
while true
  x = ....
  ...
 if abs(minx) < 1    %reversed condition
   disp(...)
   break
 end
end

Answer 2

[Azzi Abdelmalek]

I am not sure that your code converge, maybe you want

clc
tini=[21;26;29;30;23];
minx=10;
while minx>=1
  x= [1,2,3,0,0;3 6 -3 tini(3) 3;0,0, -2,-7,4;0,0,8,-3,tini(4);4,-5,8,0,0];
  invx= inv(x);
  a= [9;-3;21;tini(4);-23];
  t=invx*a;
  x=t-tini;
  minx = min (abs(x));  % I changed this line
  tini=t;
end
fprintf ('your final temp is\n')
t

[Dilesh Maharjan]

thank you very much for your help.. this is what i was trying to do..

Answer 3

[Iosif]

D=input ('Βαθος νερου σε m ')

W=input ('Βαρος ανα μοναδα μηκους της γραμμης αγκυρωσης στο νερο σε N/m ')

Hex=input ('εξωτερικη φορτηση σε kn ')

dx=input ('οριζοντια μετατοπιση σε m ')

if dx/D>=0.3 && dx/D<=0.6

else

disp ('Δωσε διαφορετικη τιμη για το dx')

dx=input ('οριζοντια μετατοπιση σε m ')

end

I want to make my programm go to if after else and run that lines again until if line is satisfied