Using arrayfun problem

Is it correct if i use the code like this:

Final Load=[0 4 4];
C=[4.4 4.4 4.4]   
N=arrayfun(@(S) function1(S,C),FinalLoad);
while any(N~=[0 0 0])
  %%test each array of FinalLoad >C(Node Broken),if true go through while
  %%loop, need to go through the loop once, but no do while function in
  %%matlab

end

function1.m

function [r] = function1(S,C)
    if(S>C)

  r =1;

      else
          r=0;
      end

Answer 1

[Walter Roberson]

The MATLAB equivalent of

do while(Condition) {Block}

is

while Condition
  Block
end

The translation is pretty direct.

The MATLAB equivalent of

do {Block} while(Condition)

can be written in three ways, two of which are minor variants of each other:

1)

while true
  Block
  if Condition; continue; end
  break;
end

2)

while true
  Block
  if ~(Condition); break; end
end

3)

continue_loop = Condition;
while continue_loop
  Block
  continue_loop = Condition;
end

Remember that you need to assign new values to at least one variable involved in the condition, or else you end up with a loop that either does not execute at all (if the condition starts false) or executes infinitely. This is true also in whatever language you are borrowing your notion of "do while" from.

Thus, you need to define a new value for N inside the loop, possibly with another call to arrayfun(). I cannot recommend new code, however, as you do not indicate any mechanism to update S or FinalLoad.

Note: the function1 that you show and the arrayfun, could be replaced trivially.

N = FinalLoad > C;

[jy tan]

it's more about whether the function1 works as expected

Let's say for the above example,

N should be = [0 1 1]

[Walter Roberson]

No N should not be that. Your FinalLoad starts as [0 4 4] and your C starts as [4.4 4.4 4.4]. 0 < 4.4, 4 < 4.4, 4 < 4.4, so all three FinalLoad values have the same relationship to C, so the result of arrayfun applied to function1 will be either [1 1 1] or [0 0 0] (depending on whether you have S>C or S<C)

None of the values in the list [0 4 4] are greater than the broken node value 4.4, so according to your comments in your code, the loop should not execute.