Matlab question marks and exclamation points

Random Matlab things I find cool or perplexing....Updated when I find something new.

3/24/12
You can use plotyy to display data on different y axes in the same figure. While there isn't presently a scatteryy command (why?), you can try something like the following:

>>[ax,h1,h2]=plotyy(x1,y1,x2,y2);
>>set(h1,'LineStyle','o');

2/17/12
1. It would be cool if, on a documentation page for a function, it let you click on a 'function history' link that showed when the function was introduced, and the changes added with each version.

2. I just found the grpstats function, which is great! I already had written separate functions for this, but theirs is much better. Enter your data, and the group assigned to each data point, and it calculates all sorts of statistics sorted by group (e.g., mean, standard error, standard deviation, etc).

3. Why isn't the following legal?

>>scatter(x,y,'Color',[a b c])

Why do they force us to use CData instead of Color for scatter plots?