Save plot every second in different file image

Please Help me.

I have the program of monitoring signal which I use plot function to view the signal. Because I use the timer function, the plot changed every second. What I want is I can save that plot for every second, let say for 10 seconds. What will I to do so the plots are saved in a file with different named? say file 1.tiff for signal 1, file 2.tiff for signal 2, and so on.

Answer 1

[Friedrich]

Hi,

in the function which is called from the timer (TimerFcn callback) before updating the plot you can save it. Lets say the TimerFcn is named

timer('TimerFcn',@my_func, 'Period', 1.0);

Than you create my_func as follows

function my_func(obj,event )

This will pass the timer object to my_func in every call. The timer object has a property called 'TasksExecuted'. With this property you can create dynamic file names easily as follows:

%before updating the plot
print(handle_to_plot,'-dtiff',['signal_',num2str(get(obj,'TasksExecuted'))]);
%update plot

More specific:

t = timer('TimerFcn',@my_func, 'Period', 1.0,'ExecutionMode','fixedRate');

start(t);

function my_func(obj,event )

get(obj,'TasksExecuted')

end

[Adi Mico]

I've tried your codes, but the result is this

Error using ==> coba>mytimer

Too many input arguments.

[Adi Mico]

the figure's name is coba

and the timer's name is mytimer

[Friedrich]

Could you post your code? The example given above works fine. Try to take the main idea and put it in your code.

[Adi Mico]

function timer_Callback(hObject, eventdata, handles)

T1=timer;

T2=timer;

set(T1,'ExecutionMode','fixedRate','BusyMode','drop','Period',1);

set(T2,'ExecutionMode','fixedRate','BusyMode','drop','Period',1);

set(T1, 'TimerFcn', @(obj, event) timerkirim(obj, event, handles));

set(T2, 'TimerFcn', @(obj, event) mytimer(obj, event, handles));

setappdata(0,'T1',T1);

setappdata(0,'T2',T2);

start(T1);

start(T2);

function mytimer(obj, event)

print(handles.axes1,'-dtiff',['signal_',num2str(get(obj,'TasksExecuted'))]);

the timerkirim is timer to update the plot

[Friedrich]

Your TimerFcn passed 3input args

set(T1, 'TimerFcn', @(obj, event) timerkirim(obj, event, handles));

But the mytimer function has only two. This would match with the error you get: Too many input arguments.

Try it that way:

set(T2, 'TimerFcn', {@mytimer,handles});

function mytimer(obj, event, handles)

print(handles.axes1,'-dtiff',['signal_',num2str(get(obj,'TasksExecuted'))]);

[Friedrich]

Look here for the right callback function syntax:

http://www.mathworks.com/help/releases/R2011a/techdoc/matlab_prog/f9-39541.html#f9-42494

[Friedrich]

Did you try ma suggestions? This wont work

set(T1, 'TimerFcn', @(obj, event) timerkirim(obj, event, handles));

set(T2, 'TimerFcn', @(obj, event) mytimer(obj, event, handles));

For T2 it have to look like this

set(T2, 'TimerFcn', {@mytimer,handles});

and the mytimer function must look like this

function mytimer(obj, event, handles)

print(handles.axes1,'-dtiff',['signal_',num2str(get(obj,'TasksExecuted'))]);

[Adi Mico]

Still got error:

Error using ==> print at 310

Handle Graphics handle must be a Figure.

[Friedrich]

handles.axes1 is an axis handle. but print need the handle of the figure.

[Adi Mico]

It worked if I write this code:

print(coba,'-dtiff',['signal_',num2str(get(obj,'TasksExecuted'))]);

At first moment there is some crush maybe because the program locating the destination image file but after a while it work with some vibration.

But it fine for me.

Thank you very much Mr.Friedrich..