How did I get this crazy Plot?

2018 5 11
0 个回答
更新时间：2018 5 11
7 次查看（30 天）

0 个投票

clc
clear all
close all
A = 1.9;
R = 10;
a = 1;
X = linspace(0.0001,0.1,100);
% Y = a.*(1 + (A^(-R))*(X.^(R-1)));
for i = 1:length(X)
Y(i) = a*(1 + (A^(-R))*(X(i)^(R-1)));
end
plot(X, Y)
If you run the above code you will get a weird plot like this (shown below).
  1. How come those many ones in the Y-axis?
  2. Instead of a straight line, How come the plot it is a curve?
  • Could anybody please explain??*

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Dennis
Dennis 2018-5-11
编辑：Dennis 2018-5-11
Y is not really 1 at every point. It is a question of precision, try vpa(Y).
For i=1 Y is 1 + 1.63e-39
Learner
Learner 2018-5-11
Yes, Solved. Thanks a lot...
Guillaume
Guillaume 2018-5-11
This is the plot I get (R2018a).
I see nothing unusual about it and I don't understand why you expect a straight line when you're effectively plotting y = c1*x.^9 + c2.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Get Started with Curve Fitting Toolbox 的更多信息

产品

版本

R2015a

标签

提问:

Learner
Learner
2018-5-11

编辑：

Dennis
Dennis
2018-5-11

Community Treasure Hunt

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

Start Hunting!

Translated by