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Does matlab have a function which can calculate the intersections of two line in N ($N\in R$)dimension?

line 1 is as follows $w_1^Tx_2=c_1$, where $w_1,x_1 \in R^N$ line 2 is as follows $w_2^Tx_2=c_2$, where $w_2,x_2 \in R^N$

Sorry, the above are hyperplanes. Since hyperplanes can be written in a concise way but lines in dimension ($N>2$) cannot, I tend to make a mistake like this.

Maybe the most concisest way to form a line is as follows, the line through $x_0$ in the direction $v$, $x=x_0+kv,k\in R$

I know there is a function 'polyxpoly'. But it only deal with $N=2$, right?

Thank you;)

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Can't you write one yourself? –  dfeuer Jul 28 '13 at 19:44
    
Also, how do these equations describe lines? Don't they actually describe (hyper)planes? –  dfeuer Jul 28 '13 at 19:46
    
May I ask you why are you using MATLAB for doing this? –  Mahdi Khosravi Jul 28 '13 at 19:56
    
Yes, you are right. Sorry about that! –  Vivian Jul 28 '13 at 19:56
    
@MahdiKhosravi: there are all sorts of reasons someone might want to do something in MATLAB. Two obvious ones are: 1. They are familiar with it, so they prefer to work within it when possible 2. They need to do something within the context of a larger MATLAB program, and it's usually better to do so in MATLAB rather than having to muck about with a foreign function interface. –  dfeuer Jul 28 '13 at 19:58

1 Answer 1

Try this. Do you have this in your version of matlab?

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No. This problem is equivalent to nothing more than solving a linear system. If done in symbolic math, the appropriate function would be sym/linsolve, which is a wrapper around the symbolic version of mldivide. –  horchler Jul 28 '13 at 21:54

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