whay is it showing error?

[ time1,dist2 ] = light_speed(D)
time1 = ((D)./(18000000));
dist2 = ((D).*(0.6215));

this is code for geting time for light to reach to earth in minute and distance converted to miles. Why is it showing error for argument 150000000 always. though we dont take that distance in vector.

Answer 1

[the cyclist]

I saved this function

function [time1,dist2] = light_speed(D)
  time1 = ((D)./(18000000));
  dist2 = ((D).*(0.6215));
end

into a file named light_speed.m, and got

[t,d] = light_speed(150000000)

t =
    8.3333
d =
   9.3225e+07

I don't see a problem.

[Purvil Patel]

Yeah exactly but then also autograder showing this error.

Problem 6 (light_speed): Testing with argument(s) 150000000 Feedback: Your function made an error for argument(s) 150000000

    Your solution is _not_ correct.

[Image Analyst]

Perhaps you reversed the output arguments compared to what it wants??? Can you post the exact wording of the question?

[Roger Stafford]

I would suggest that the autograder in your class is set to too great an accuracy. The 150,000,000 kilometers is a bit too large and the ratio .6215 is also a bit high giving a product of 93225000 miles, whereas the official astronomical unit value is 92955807 miles. Try resetting the ratio to .62137119 and the distance to 149597870 kilometers.

[the cyclist]

Another possibility is that you have a simple syntax error. Notice that my code is not exactly the same as your code. Compare them line-by-line and perhaps you will expose the error.

For example, are you supposed to submit a function or a script?