in your LU decomp file exchange, what does the ' character do?

in the file exchange is an LU decomp example by Timothee called, of course, LU Decomposition. in it is a line that says:

xstar_soln=xstar_soln'; and a second similar statement that says: x_soln=x_soln';

what does the primed character, ', do? is it just another character? what does this statement accomplish? - it seems meaningless, since the primed variable never appears anywhere else in the script.

I am just learning Matlab, and don't know where to find answers to this kind of question.

Answer 1

[Harry]

It is the complex conjugate transpose operator:

http://www.mathworks.co.uk/help/matlab/ref/ctranspose.html

[Matt J]

Diane commented:

Thank you! that explains why it does not work without it!

[Jan]

@Diane: Please accept this answer, if it solves your problem. The section for answers should be used for answers only, not for comments to otehr answers. Thanks.