How can i give difference to Variable

2013 6 8
2 个回答
5 次查看（30 天）

0 个投票

How can i give difference to number by '
S
S'
S''
And i will use it in next calculation.
U=S+1
U'=S'+2
P=S''+5 ....etc
But error message appeared

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回答（2 个）

Matt J
Matt J 2013-6-8
编辑：Matt J 2013-6-8

0 个投票

Not for me. It should Hermitian transpose S for as many times as you apply the '.
>> S=1:5; S'''''''''''
ans =
1
2
3
4
5
Matt J
Matt J 2013-6-8
编辑：Matt J 2013-6-8

0 个投票

You haven't shown your error (or the code that generates it), so I have to guess what you are doing, but you cannot include non-alphanumeric characters other than underscores in the names of variables.
In any case, to solve a linear system of equations, you wouldn't define different variables. You would write the equations in matrix-vector form
A*x=b
and solve via
x=A\b
This is MATLAB, after all!

3 个评论
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Light
Light 2013-6-8
编辑：Matt J 2013-6-8
I'm a electrical engineering student. I need different variables.
dQ(max(negcolumn))=dx(max(negcolumn))*U(max(negcolumn)).^2*10.^-6;
S'(max(negcolumn))=S(max(negcolumn))-dQ(max(negcolumn))*1i;
S''(max(onerow))=S'(max(negcolumn))+S(max(onerow));
S is changed in everystep.
And S' is used in next step
dU01'=(real(S')*real(R01)+imag(S')*imag(R01))./U0/1000;
dU01''=(real(S')*imag(R01)-imag(S')*real(R01))./U0/1000;
U01t=sqrt((U0-dU01').^2+dU01''.^2);
If S S' S'' is only defined by S i can't get real S' value. Is it impossible in MATLAB??
Matt J
Matt J 2013-6-8
None of what you said implies that S' has to have an apostrophe in its name. You could choose another name for it.
None of what you said that S and S' have to be separate variables, either. You could call them S(1) and S(2) instead, making them part of the same vector, S.
Light
Light 2013-6-8
I've already called them S(1) , S(2) ... (max(onerow)) is variable if it is defined by 2 S'(max(negcolumn)) will be changed S'(2)
But now accepting ur offer i will choose another name.
Thank you!

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Light
Light
2013-6-8

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