Recent content by zslevi

Optimal control and estimation - Robert F. Stengel (contains the needed mathematics, and has plenty of examples)

Now I've got it. Both the gradient func., both quiver plot uses the following indexing scheme: field(y,x)

I have been playing around with the Matlab quiver plot, and I found something strange: it seems that the gradient vector isn't computed correctly. ( I use the gradient of an exponential function as a velocity field). Please try the following code. The interesting part is in the last loop...

Someday you might want to become a quant, so slower with the schadenfreude.

Thanks for the explanation.

Now it works fine, thanks. However I still don't get what those single dollar signs are doing: are you nesting equation environments, or what?

Of course I was using my local LaTex installation.

And I get the following error message for $$ {\rm neutrons} + \underbrace{ {\rm protons} \makebox[0pt][r]{$\underbrace{ {\rm neutrons} + {\rm protons} }_{\rm nucleons} }+ {\rm electrons} }_{\rm charged} $$! Missing $ inserted. <inserted text> $ l.14 + {\rm electrons} }...

Can somebody tell me that in previous examples what does the $ sign do before the \underbrace tag? At first I thought it's a typo.