How to add a step size of 2

84 次查看（过去 30 天）
Tony Hill
Tony Hill 2014-4-27
评论： Image Analyst 2014-4-28
Ok so i have a function to write and it is supposed to calculate and return the product of 1 to n in a step size of 2.
for n = 1:2
inv(1*3*5*7);
end
How do i make this a step size of two? Do i do for n = 1:n:2?
  3 个评论
显示 1更早的评论
Tony Hill
Tony Hill 2014-4-27
ok i changed it to
For n = 1:n:2 and i keep getting a syntax error about variable n being used before it was assigned
Star Strider
Star Strider 2014-4-27
You’re getting there.
From the documentation:
Using two colons to create a vector with arbitrary real increments between the elements,
E = 0:.1:.5
results in
E =
0 0.1000 0.2000 0.3000 0.4000 0.5000

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Geoff Hayes
Geoff Hayes 2014-4-27
Hi Tony,
Either type help for in the MATLAB command window to get information on for loop syntax, or visit the following link: for loop.
Geoff
Image Analyst
Image Analyst 2014-4-28
No for loop is needed at all. See the prod() function.
And you got the colon stuff in the wrong order. The correct order is startingValue : stepAmount : endingValue. You put the step at the end instead of the middle.
  1 个评论
Image Analyst
Image Analyst 2014-4-28
Anyway, that problem is trivial, toddler-level stuff. Here's a far more interesting question for you:
Investigate these two different equations with different values of n:
sum1 = 1^n + 19^n + 20^n + 51^n + 57^n + 80^n + 82^n
sum2 = 2^n + 12^n + 31^n + 40^n + 69^n + 71^n + 85^n
Explain what you see and why you see it.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

尚未输入任何标签。

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by