how to rectify the below error..

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Priya M
Priya M 2021-10-13
评论： Priya M 2021-10-13
Here i tried simple ordinary differential equation problem...i got an error..
Please anyone solve my query..and point out my mistakes..
i have attached my code also...
Thank you..

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回答（1 个）

KSSV
KSSV 2021-10-13
You need to have the function cheb.m, which you can download from:
https://people.maths.ox.ac.uk/trefethen/cheb.m
and then you need to change this line:
A=D^3+0+a2*D+a3*I;
to
A=D.^3+0+a2.*D+a3.*I;

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