What does this statement mean "Use a for loop to move x = 'a' half the distance to 'b' and do it 'n' times."
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I am creating a function m file called mystepcloser, this is the information I was provided with.
mystepcloser(a,b,n) which takes three inputs:
a: A real number.
b: A real number which you may assume is greater than 'a'.
n: A positive integer.
Does: Uses a for loop to move x = 'a' half the distance to 'b' and do it 'n' times.
Returns: The final value of 'a'.
I do not understand what it is suppose to do. What does it mean to move x='a' half the distance to 'b' and do it 'n' times. How would I go about creating a for loop that does this, and how would I make the for loop return the final value of 'a'?
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Image Analyst
2014-9-14
Use a for loop
for k = 1 : n
In the for loop have a value called aNew that will get updated with the latest value of a. aNew starts at b. At each iteration calculate the difference between a and aNew - this is the distance. Divide the distance by 2 and add it to "a" to get a new aNew. This will go on "n" times and when you're done set a=aNew because you're supposed to have the final value in a. Actually the function should return the value
function aNew = mystepcloser(a,b,n)
If you do that you don't need to stuff aNew into a since the final value, aNew, is being returned. Good luck finishing the code. It's actually very easy.
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David Young
2014-9-14
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Suppose a is 3 and b is 7. Then the 'distance' from a to b is 4, half the distance is 2, and moving a that much towards b means adding 2 to a to make it 5. Then do it again and a becomes 6 ... and so on.
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