MATLAB: Undefined function or variable ‘a’.

Question

My current problem refers to the below script and function.

clear;
  for x=100:145
  assfunct1(x);
  fprintf('x: %d, a: %d, b: %d, c: %d\n', x, a, b, c);
  end;

&

function [a,b,c] = assfunct1(x)
if x<0 || fix(x) ~=x;
   disp('error, input is not a non negative integer')
return
end
for a=1:x
    b=sqrt(5*a^3);
    c=sqrt((a+b)^2);
end
    [a,b,c]
end
>> Assignment1
ans =
     1.0e+03 *
      0.1000    2.2361    2.3361
Undefined function or variable 'a'.
Error in Assignment1 (line 4)
fprintf('x: %d, a: %d, b: %d, c: %d\n', x, a, b, c);

Been trying for hours to work where I have erred, ty for any help you can offer.

Answer 1

You have to collect the output of your custom function assfunct3() with a variable that then you have to feed in the fprintf.

Since you call assfunct3 but do not collect the result with anything, then fprintf does not really know what variable 'a' is because the 'a' you use in the header of the assfunct3 remains local to that function.

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thanks in advance

John

jgb2012@sky.com