# 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.

2 vues (au cours des 30 derniers jours)
Chun Kit NG le 8 Fév 2022
Commenté : Walter Roberson le 9 Fév 2022
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Chun Kit NG le 8 Fév 2022
just using matlab to write code to solve question. Find c1,c2 and c3.
Jan le 8 Fév 2022
@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.

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### Réponses (1)

Image Analyst le 8 Fév 2022
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!
##### 4 commentairesAfficher 2 commentaires plus anciensMasquer 2 commentaires plus anciens
Chun Kit NG le 9 Fév 2022
I don't know how to continue. How can i input the matrix and solve Ac-y?
Walter Roberson le 9 Fév 2022
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

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