How do I loop a program that waits for a .dat file to be updated?
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I am trying to loop a program that calls data from a gui input.
In this case 'steps.dat' is created from a gui input and everytime the input changes so does the .dat file. Now I need to loop this program so that everytime the input changes the program runs, but i dont want it to run endlessly i want it to wait for the .dat file to be changed.
Thank you
while
F=load('steps.dat')
for motornum= 1:3
direc= sign(F(motornum))
steps=abs(F(motornum))
end
end
3 个评论
Luna
2018-11-19
what kind of gui element you are using to get your .dat file?
Sam Soifer
2018-11-19
编辑：Sam Soifer
2018-11-19
Luna
2018-11-20
Your gui element means when you import your .dat file to your gui by using a browse button, etc.
Define a callback function for that uicontrol object then you can do what ever you want, each time you clicked the button matlab calls the callback function.
采纳的回答
Mark Sherstan
2018-11-19
Depending on the size of your .dat file this may work for your application:
while
while ~isfile('steps.dat'); end
F = load('steps.dat');
for motornum = 1:3
direc = sign(F(motornum));
steps = abs(F(motornum));
end
delete steps.dat
end
5 个评论
Sam Soifer
2018-11-19
Mark Sherstan
2018-11-20
Sorry I mis read / mis understood part of your question. This should now work:
while 1
while 1
if isfile('steps.dat') == 1
F = load('steps.dat');
break
end
end
for motornum = 1:3
direc = sign(F(motornum));
steps = abs(F(motornum));
end
delete steps.dat
end
Please let me know if it works!
Sam Soifer
2018-11-20
Mark Sherstan
2018-11-20
Something from your GUI writing the file isent being initialized then. It worked for me when I dragged the file into the directory.
Sam Soifer
2018-11-20
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