This leads to minc ||Ac − y||, Now for n = 10, xj = 1 + (j − 1)/(n − 1) and yj = e xj , find c1, c2 and c3. Solve problem by using matlab.

1 次查看（过去 30 天）

显示更早的评论

Chun Kit NG 2022-2-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1645290-this-leads-to-minc-ac-y-now-for-n-10-xj-1-j-1-n-1-and-yj-e-xj-find-c1-c2

评论： Walter Roberson 2022-2-9

3 个评论
显示 1更早的评论隐藏 1更早的评论

Chun Kit NG 2022-2-8

just using matlab to write code to solve question. Find c1,c2 and c3.

Jan 2022-2-8

@Chun Kit NG: This is the question of your homework. But what is your question? The forum will not solve your homework, but if you show your current code and ask a specific question, we assist you to solve it by your own.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Image Analyst 2022-2-8

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1645290-this-leads-to-minc-ac-y-now-for-n-10-xj-1-j-1-n-1-and-yj-e-xj-find-c1-c2#answer_891260

在 MATLAB Online 中打开

Did you code in the equations it told you to? From the question:

n = 10
x = 1 + (1:10 - 1) / (n-1)
y = exp(..........

and then call polyfit() to fit the quadratic? It's literally just 4 lines of code - including the call to polyfit(). I'm confident you can do it!

How do I get help on homework questions on MATLAB Answers? - MATLAB Answers - MATLAB Central

4 个评论
显示 2更早的评论隐藏 2更早的评论

Chun Kit NG 2022-2-9

I don't know how to continue. How can i input the matrix and solve Ac-y?

Walter Roberson 2022-2-9

在 MATLAB Online 中打开

format long g
A = magic(5)
A = 5×5
    17    24     1     8    15
    23     5     7    14    16
     4     6    13    20    22
    10    12    19    21     3
    11    18    25     2     9
b = [7 3 8 2 4].'
b = 5×1
     7
     3
     8
     2
     4
c = A\b
c = 5×1
        -0.148269230769231
         0.184423076923077
       -0.0261538461538461
        0.0382692307692308
         0.320961538461538
A*c - b
ans = 5×1
	1.0e+00 *

                         0
                         0
                         0
     -2.22044604925031e-16
                         0