MATLAB Central Newsreader - plots with for loops..URGENT PLZ

plots with for loops..URGENT PLZ

Abinayan Parthiban — Fri, 16 Nov 2007 15:07:27 -0500

hi,
Im starting to learn matlab,and I have a problem.
Basically, I have 2 column matrices,
X=[1;2;3;4;5;6;7],Y=[1;3;5;6;8;7;9]..
I want to plot them for each coordinates, but I want them
to plot each coordinate in the graph after a 2 second
interval. So, the plot looks something like this,

      | |
      | ---> after 2 seconds--> | .(1,3)
      | .(1,1) |
      |_______ |_______

And so, on.. It should be on the same plot, so that it
looks like an animation.
I was trying to use the basic plot(x,y) with a for loop,
and trying to find some kind of a delay function, so that
it delays the plot by 2 secs. Can anyone please help me on
this programme. Thanks.
Abi.

Re: plots with for loops..URGENT PLZ

Stuart Kozola — Fri, 16 Nov 2007 15:15:21 -0500

Try:

help pause

'pause(2)' will pause for two seconds. You should also look at 'drawnow' if
your plot does not refresh as fast as you'd hoped.

Stu

"Abinayan Parthiban" <abinayanp@yahoo.co.uk> wrote in message
news:fhkbnf$56v$1@fred.mathworks.com...
> hi,
> Im starting to learn matlab,and I have a problem.
> Basically, I have 2 column matrices,
> X=[1;2;3;4;5;6;7],Y=[1;3;5;6;8;7;9]..
> I want to plot them for each coordinates, but I want them
> to plot each coordinate in the graph after a 2 second
> interval. So, the plot looks something like this,
>
> | |
> | ---> after 2 seconds--> | .(1,3)
> | .(1,1) |
> |_______ |_______
>
> And so, on.. It should be on the same plot, so that it
> looks like an animation.
> I was trying to use the basic plot(x,y) with a for loop,
> and trying to find some kind of a delay function, so that
> it delays the plot by 2 secs. Can anyone please help me on
> this programme. Thanks.
> Abi.

Re: plots with for loops..URGENT PLZ

Abinayan Parthiban — Fri, 16 Nov 2007 15:35:47 -0500

oh.. will look for it in the help.. thanks very much for
that..
Now if I wanted to plot each coordinates one at a time, how
do i use the for loop for that?
X=[1;2;3;4;5;6;7],Y=[1;3;5;6;8;7;9]
those are the coordinates.
Thanks.

Abi.

"Stuart Kozola" <skozola@mathworks.com> wrote in message
<fhkc6a$brv$1@fred.mathworks.com>...
> Try:
>
> help pause
>
> 'pause(2)' will pause for two seconds. You should also
look at 'drawnow' if
> your plot does not refresh as fast as you'd hoped.
>
> Stu
>
>
> "Abinayan Parthiban" <abinayanp@yahoo.co.uk> wrote in
message
> news:fhkbnf$56v$1@fred.mathworks.com...
> > hi,
> > Im starting to learn matlab,and I have a problem.
> > Basically, I have 2 column matrices,
> > X=[1;2;3;4;5;6;7],Y=[1;3;5;6;8;7;9]..
> > I want to plot them for each coordinates, but I want
them
> > to plot each coordinate in the graph after a 2 second
> > interval. So, the plot looks something like this,
> >
> > | |
> > | ---> after 2 seconds--> | .(1,3)
> > | .(1,1) |
> > |_______ |_______
> >
> > And so, on.. It should be on the same plot, so that it
> > looks like an animation.
> > I was trying to use the basic plot(x,y) with a for loop,
> > and trying to find some kind of a delay function, so
that
> > it delays the plot by 2 secs. Can anyone please help me
on
> > this programme. Thanks.
> > Abi.
>
>

Re: plots with for loops..URGENT PLZ

Peter Boettcher — Fri, 16 Nov 2007 15:37:33 -0500

"Abinayan Parthiban" <abinayanp@yahoo.co.uk> writes:

> oh.. will look for it in the help.. thanks very much for
> that..
> Now if I wanted to plot each coordinates one at a time, how
> do i use the for loop for that?
> X=[1;2;3;4;5;6;7],Y=[1;3;5;6;8;7;9]
> those are the coordinates.
> Thanks.

How do you plot just the first point? How do you plot just the second
point? Do those at the command line.

Then, how do you generalize that to plot the i'th point. Try it out.

Then, wrap that line in a loop that sets i to changing values.

-Peter