How to append to plot, or continuously update plot? plot3d? plot3?

Hey,

I am trying to use matlab for "real time" processing and display.

I would like to update a plot with new data and have that data be
appended to a plot.

This will be a 3d plot using plot3 command. A constant X axis will be
defined for this figure and I would like to plot until the X axis is
completely filled up. 8 lines will be drawn on this plot.

This was my plan...
1) initialize the plot with some initial data. Also set the X axis to
the maximum length desired.
2) Update the plot
2.1) get current data on plot using get(h, 'Xdata')
2.2) make a new variable the length of oldXdata and newXdata.
2.3) concat oldXdata with newXdata
2.4) redraw

is there a simpler way to do this? I am getting lost because the
Xdata for a plot3d is a cell array and im having trouble combining the
newXdata with the oldXdata.

Any help would be appreciated,

Thanks,
Kamil

 

Have you tried plotting in a loop and using the 'hold on' command?

 

hi Dave,
I tried using hold on, but the figure is not shown in real-time. It is AFTER all the plots are made.

 

Du you call GET with array of handle ? Fort single handle it returns double array.

Show important snips of your code.

You could also initialize your plots with NaN array having a maximum size, and fill progressively the tail NaN with real data. This might accelerate slightly the updating.

Bruno

 

Use commands DRAWNOW or REFRESH to force the plot.

Bruno

 

with loop. For 2D data, "comet" plots in real time. For 3D data, no
idea!

Cheers!
Richard

 

try pause in while(1) loop
E.g.
while(1)
..
..
update data
plot(x,data)
pause(time)
..
..
end

 

Hello Kamil,

Can you tell us the solution?
How did you accomplish it?
I'd like to do the same but i'm missing some important steps apparenly.

Kind Regards,
Kristof