Matrix dimension must agree
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Ihave a code
xd=-(sqrt(R²-ho²)):0.5:x3;
xd1=x3;
yd1=y3;
xd2=-(sqrt(R²-ho²));
yd2=ho;
yd=(((xd-xd1)./(xd2-xd1)).*(yd2-yd1))+(yd1);
plot(xd,yd,'k')
The result is:
Eror using .* Matrix dimensions must agree.
Please help mee ?
*code formatted by Adam Danz; the squared superscripts are ambiguous (^2 or .^2) so I left them as-is - AD
3 个评论
KALYAN ACHARJYA
2020-1-9
编辑：KALYAN ACHARJYA
2020-1-9
Please define all those parameters. R,ho,x3,sd1....etc
David Hill
2020-1-9
You need to provide more information. Look at the size of each of your matrixes. If you want help you will need to provide examples of your variables.
Saskia Nur Santika
2020-1-9
采纳的回答
Adam Danz
2020-1-9
In this line
yd = (((xd-xd1)./(xd2-xd1)).*(yd2-yd1))+(yd1);
% ^^
The terms to the left and right of .* are not the same size. The dot-asterisk notation specifies element-wise multiplication where x .* y is interpretted as x(i) * y(i). That requires that x and y are the same size.
The two lines below must produce the same output.
size(((xd-xd1)./(xd2-xd1)))
size((yd2-yd1))
2 个评论
Saskia Nur Santika
2020-1-9
KALYAN ACHARJYA
2020-1-9
If your question is answered, you can accept the answer.
更多回答（1 个）
Mateus Banroc
2020-1-9
Hi Saskia,
In your code, I guess that only xd and yd are vectors, right? So x3, y3, R and ho should be scalars.
I don't know what are the values of these scalars but I tried this and it worked.
R=10; ho=2;
x3=10;
y3=10;
xd=-(sqrt(R^2-ho^2)):0.5:x3;
xd1=x3;
yd1=y3;
xd2=-(sqrt(R^2-ho^2));
yd2=ho;
yd=(((xd-xd1)./(xd2-xd1)).*(yd2-yd1))+(yd1);
plot(xd,yd,'k')
You must check if R, ho, x3, y3 are scalars.
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