Hi there.

I am working on Excel for a recent maths project, and have encountered a problem when plotting co-ordinates that form a 2D shape, from a mmult calculation.

My dilemma is this:

I have around 265 co-ordinates, all in a set order that have been plotted as a joined scatter graph, with a mmult applied to rotate my shape 50 degrees, for example. The maths behind what I have done is correct, but the new shape is not drawn as expected - it is sort of compressed down and flat, instead of being the same dimensions as it is before the calculation was applied.

From here I am then looking to reflect the new shape in a line, which of course bases the new calculation on the previous rotation outcome.

I hope that I have explained myself properly (!) and thanks in advance to anyone that could advise on where I may be going wrong.