Is it possible to brush data on a plot and have it assigned to a variable immediatly after brushing instead of having to save it manually?

I would like to plot data, once plotted I would be directed to brush the data I want to use. Following the brush I would like to click the enter key and have code in matlab to save what I brushed without me having to do it manually.

Answer 1

[Cindy Solomon]

Hi Calabrese,

There is no in-built functionality to do this in MATLAB, but there a few potential workarounds that you could look into:

1) This function on File Exchange has a lot of interesting functionality that other users have found helpful and recommended in similar use cases.

2) Adding a function to the callback that executes once data is brushed. (This callback is called ActionPostCallback.)

3) Adding some sort of event-listener to a property, such as the example here.

I hope this helps!

[Calabrese]

What is this function on File Exchange? Could you maybe provide an example to the ActionPostCallback and event-listner?

figure(1)
plot(Time,IAMHS,'y', Time,CMP1,'m', Time,CMP2,'c', Time,PDU_OP,'r',... 
     Time,ThreePThreeV,'g', Time,TenV_PREF,'b', Time,TenV_REF,'k')
title('all parameters')
axis([min(Time),max(Time),4.7,5.3])

pause

I am plotting 7 sets of data in a line plot

I use the brushing tool to select the chunks of data I would like to further evaluate. I am selecting an equal number of points for each of the 7 sets of data on the one plot.

Is there a way to reassign the variables IAMHS, CMP1, CMP2, PDU_OP, ThreePThreeV, TenV_PREF, and TenV_REF to the new selected sections with one of those options without having to go to tools->brushing->create new variable and then assign each variable 1 at a time?

[Calabrese]

I have used this feature for an individual plot but my data comes back empty

 figure(3)
 x = plot(Time,CMP1,'m')
 title('CMP1')
 axis([min(Time),max(Time),4.7,5.3])
 brush on
 pause

 hB = findobj(x,'-property','BrushData');
 a = set(hB,'BrushData', 'YourNewValues')
 b = get(hB,'BrushData');