how can i write the code out for this 1-1/2+1/3-1/4+1/5-,.....

how can i write the code out for this 1-1/2+1/3-1/4+1/5-,.....

[Vladimir Sovkov]

S=log(2)

[per isakson]

Homework?

Answer 1

[KSSV]

It is your Home work..you have to do it. Do the following.

1. Read about for loop.
2. Fix the value of n, to run a loop.
3. You can decide the sign -, + by using mod.
4. Intialize sum = 0, and add every time to loop (-1)^i*(1/j)

[Vladimir Sovkov]

No need in a loop. 1-line code with the "sum" function would be much more efficient. Although, again, the best way to compute it is

S=log(2)

[KSSV]

@Vladimir Sovkov

You know it log(2), you know that it can be solved without loop. Do you think OP knows that? How you think they can learn MATLAB without knwowing basics?

[Vladimir Sovkov]

Two possibilities:

1. It is a homework indeed. This case I do not want to explain anything--it is a responsibility of their professor, not me; besides, we do not know what the professor wants from them exactly.
2. It is not a homework. They just encountered this problem in their current work but their matrhematical background is not good enough to find the best solution. This case my answer is the most useful.

[Vladimir Sovkov]

Moreover: one of the basic ideologies of Matlab is to avoid loops wherever possible. Hence, an advice to do it without a loop must be instructive for learning Matlab as well.