Calling timer function from within another function
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I want to use the timer function within another function. Moreover, it must have access to the values of variables within that function in order for its callback commands to execute. However, the timer function always works in the base workspace, even if called from a function (which seems extremely counterintuitive, but there it is). So, how do I allow it to know about the variables within the function it's being called from? For e.g., the following function doit should display 2 every second for 5 seconds, but it won't because the timer executes in the base workspace and x is not present in that workspace. (Also, I want to avoid having to explicitly assign a copy of x in the base workspace from within the function doit, such as by using the assignin command - there should be a better way to do it than that.)
function doit
x=2;
t=timer('TimerFcn', 'x', 'ExecutionMode', 'fixedRate', 'Period', 1);
start(t)
pause(5)
stop(t)
delete(t)
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回答(3 个)
Paulo Silva
2011-6-29
function doit
x=2;
t=timer('TimerFcn', @fun, 'ExecutionMode', 'fixedRate', 'Period', 1);
function fun(obj,event)
x
end
start(t)
pause(5)
stop(t)
delete(t)
end
2 个评论
Walter Roberson
2011-6-29
Or very nearly equivalently:
function doit
x=2;
t = timer('TimerFcn', @(obj,event) x, 'ExecutionMode', 'fixedRate', 'Period', 1);
start(t)
pause(5)
stop(t)
delete(t)
end
Giles
2011-7-1
1 个评论
Paulo Silva
2011-7-1
Not that arbitrary, please read the documentation so you can better understand
doc function_handle
另请参阅
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