What does the >> n = 1:100; >> x = ( (-1).^(n+1) ) ./ (2*n - 1); >> y = sum(x) >>plot(x(1,1:4)) mean?

1 次查看（过去 30 天）
NN
NN 2023-10-8
评论： NN 2023-10-8
>> n = 1:100;
>> x = ( (-1).^(n+1) ) ./ (2*n - 1);
>> y = sum(x)
>>plot(x(1,1:4))
While executing this, what is the meaning and answer of plot line (Last command)?
  1 个评论
John D'Errico
John D'Errico 2023-10-8
编辑：John D'Errico 2023-10-8
Why not try it?
Even better, why not take a basic MATLAB tutorial, and learn MATLAB? It will be time well spent. After all, is there a reason why we should be writing an entire tutorial in MATLAB for you here, when it already exists?
If not, then look at one line at a time. TRY IT! If you don't know what the first line does, then you definitely need to start reading the manual.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2023-10-8
Ran in:
x is a row vector so it doesn't need two indexes. y is assigned but not used. The plot() plots the first 4 values from the x array (row 1, columns 1-4):
n = 1:100;
x = ( (-1).^(n+1) ) ./ (2*n - 1)
x = 1×100
1.0000 -0.3333 0.2000 -0.1429 0.1111 -0.0909 0.0769 -0.0667 0.0588 -0.0526 0.0476 -0.0435 0.0400 -0.0370 0.0345 -0.0323 0.0303 -0.0286 0.0270 -0.0256 0.0244 -0.0233 0.0222 -0.0213 0.0204 -0.0196 0.0189 -0.0182 0.0175 -0.0169
y = sum(x)
y = 0.7829
plot(x(1, 1:4), 'b.-', 'LineWidth', 2, 'MarkerSize', 40)
grid on;
title('Plot of first 4 values of x in row 1')
ylabel('x');
xlabel('Index')
To learn other fundamental concepts, invest 2 hours of your time here:
MATLAB Academy - Free 2 hour training

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MATLAB 的更多信息

标签

产品


版本

R2021a

Community Treasure Hunt

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

Start Hunting!

Translated by