Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: streamline dereferencing of cell array into argument list
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
Paul

Posts: 263
Registered: 2/23/10
streamline dereferencing of cell array into argument list
Posted: Mar 20, 2013 6:23 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

If I have column vectors x & y of the same length, I know that I can
plot a series of points via plot(x,y). Alternatively, I can plot each
vector as a series of points against their indexes via plot([x y]).
But let's say that I'm interested in the first case.

Now if I wanted a quick and dirty way to plot just a handful of points
[x1,y1], [x2,y2], and [x3,y3] without writing many statements, I can
use:

myPts = mat2cell( [x1 y1; x2 y2; x3 y3], [3], [1 1] )
plot( myPts{:} );

This is exactly the 2-vector form above, but the code keeps each pair
of x & y values together instead of handling the x-vector separately
from the y-vector. In many cases, that kind of visual binding is
helpful when I'm quickly hacking through various coding possibilites
in an exploratory manner because I have the coordinates in my head as
numerical pairs. Granted, the need to think about the 2nd & 3rd
arguments to mat2cell makes it questionable whether this is really
more streamlined, but let's ignore that for now.

My question is whether there is a more direct way of getting the
argument list in the 2nd statement. In the example above, I need to
assign it to myPts before dereferencing the cells. It's too bad we
can't do something like

plot( mat2cell( [x1 y1; x2 y2; x3 y3], [3], [1 1] ){:} )



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.