The following is the code that does not work -
for x in #y
v = #graph.get_object("me") # This is not a useful code. I'm just trying to make a point
end
While the following code works
u = #graph.get_object("me")
for x in #y
v = u
end
I'd appreciate help with this issue. Thanks!
I tried testing something similar to this in the console, and saying something like
for i in 1..1000
#graph.get_object("me")
end
and after some amount of time, it finally finished.. but it took a while. I'm assuming there's a chance the connection between you and facebook can get blocked/closed/timeout.
Every call took about a second. I think the problem is that facebook's API has a bandwidth limit. So, in the case of your first block of code, you're calling get_object over and over, where as in the second one, you are simply calling the API once, then just assigning that value over and over.
Related
I am working on some modifications to EEGlab's eegplot function (things like vim-style navigation etc.) that need to work through WindowKeyPressFcn.
However, the callback is not being called for some reason. I have been debugging the issue for some time and am a bit lost. I am looking for suggestions on what might be wrong. Unfortunatelly the eegplot function is big, complex and somewhat convoluted and I was unable to reproduce the issue in a simple example. Therefore I am looking for general suggestions on why a function handle that is clearly present in WindowKeyPressFcn might stop being used at some point.
Here is what I have learned so far:
If I go to debug mode in eegplot (set a breakpoint near the end of the setup function [the first half of eegplot]) I am able to run the WindowKeyPressFcn at least once.
However - the function stops being called at some point during debug (sometimes even after being called only once).
If I run eegplot without debug (that is wait for it to finish and return control to me) I am unable to call WindowKeyPressFcn by pressing a key. The function handle is still present in WindowKeyPressFcn property of the figure.
Whener the WindowKeyPressFcn is not being used when I press a key, I can still call it with:
figh = gcf;
fun = get(figh, 'WindowKeyPressFcn');
ev.Key = 'rightarrow';
ev.Character = ' ';
ev.Modifier = [];
feval(fun, figh, ev);
So the function handle is 'healthy' so to speak, but for some reason it is not being used any more when a key is pressed and the figure has focus. When and why something like this could happen? Any ideas on things I should check to understand this issue?
Update:
I found out that WindowKeyPressFcn callback can sometimes be blocked by some window listeners, and tried out the following solution:
hManager = uigetmodemanager(gcf);
set(hManager.WindowListenerHandles,'Enable','off');
It doesn't work - WindowKeyPressFcn is still not called when I press a key. :(
Update 2:
Another thing that does not work:
chld = get(gcf, 'Children');
tp = get(chld, 'type');
chld = chld(strcmp(tp, 'uicontrol'));
set(chld, 'KeyPressFcn', #eegplot_readkey_new)
(eegplot_readkey_new is the function I use for reacting to keypresses)
Update 3:
And another one not working:
addlistener(gcf, 'WindowKeyPress', #eegplot_readkey_new);
Ok - I fiugred it out, although the solution is weird to say the least.
For some mysterious reason using linesmoothing undocummented property prevents WindowKeyPressFcn from being called. I have absolutely no idea why...
I'm relatively new to Matlab, and I've been trying to solve my problem for ages but I'm just continuously arriving at a dead end.
I have a code which should, in theory, play 3 sounds in a random order (each order being different for each trial). Upon each sound playing the participant will be asked which sound they heard and then given feedback. I have all the code complete and working up until the random order part. I have created code that on each trial will randomly order 1,2 and 3.
Order = [1, 2, 3];
PhonemeOrder = randperm (numel(Order));
I then have a function which plays the sound/asks the questions etc. within this I have attempted switch cases statements and if else statements depending on the number that PhonemeOrder produces but the order doesnt change even when phoneme order does. I believe my problem is however that PhonemeOrder comes out like [1,2,3] or [3,1,2] which is what i wanted. but Im not sure how to get my sounds to play in the order that it shows because I am using code like...
if/ PhonemeOrder = 1;
then do this...
elseif phonemeorder = 2;
then do this...
else
do this...
Or I've tried code like
switch cases
case 1
do this
case 2
do this
case 3
do this
I'm guessing this is where i am going wrong, but i just dont know how to change it and make it work! I hope this makes sense? I just need it to play in the order that phonemeorder specifies, with the order changing on each trial.
Any help will be greatly appreciated :D
bexG,
I think you are on the right track.
The only thing you need is to use a "for-loop" to go through the array of PhonemeOrder.
for i=1:length(PhonemeOrder)
switch PhonemeOrder(i)
case 1
play the first song
case 2
play the second song
case 3
play the thrid song
end
end
I hope this will help.
Please let me know if you have any further question.
I am looking for a way to save 'everything' in the matlab session when it is stopped for debugging.
Example
function funmain
a=1;
if a>1
funsub(1)
end
funsub(2)
end
function funsub(c)
b = c + 1;
funsubsub(c)
end
function funsubsub(c)
c = c + 2; %Line with breakpoint
end
When I finally reach the line with the breakpoint, I can easily navigate all workspaces and see where all function calls are made.
The question
How can I preserve this situation?
When debugging nested programs that take a long time to run, I often find myself waiting for a long time to reach a breakpoint. And sometimes I just have to close matlab, or want to try some stuff and later return to this point, so therefore finding a way to store this state would be quite desirable. I work in Windows Server 2008, but would prefer a platform independant solution that does not require installation of any software.
What have I tried
1. Saving all variables in the workspace: This works sometimes, but often I will also need to navigate other workspaces
2. Saving all variables in the calling workspace: This is already better as I can run the lowest function again, but may still be insufficient. Doing this for all nested workspaces is not very convenient, and navigating the saved workspaces may be even worse.
Besides the mentioned inconveniences, this also doesn't allow me to see the exact route via which the breakpoint is reached. Therefore I hope there is a better solution!
Code structure example
The code looks a bit like this
function fmain
fsub1()
fsub2()
fsub3()
end
function fsub1
fsubsub11
fsubsub12
...
fsubsub19
end
function fsub2
fsubsub21
fsubsub22
...
fsubsub29
end
function fsub3
fsubsub31
fsubsub32
...
fsubsub39
end
function fsubsub29
fsubsubsub291
fsubsubsub292% The break may occur in here
...
fsubsubsub299
The break can of course occur anywhere, and normally I would be able to navigate the workspace and all those above it.
Checkpointing
What you're looking to implement is known as checkpointing code. This can be very useful on pieces of code that run for a very long time. Let's take a very simple example:
f=zeros(1e6,1);
for i=1:1e6
f(i) = g(i) + i*2+5; % //do some stuff with f, not important for this example
end
This would obviously take a while on most machines so it would be a pain if it ran half way, and then you had to restart. So let's add a checkpoint!
f=zeros(1e6,1);
i=1; % //start at 1
% //unless there is a previous checkpoint, in which case skip all those iterations
if exist('checkpoint.mat')==2
load('checkpoint.mat'); % //this will load f and i
end
while i<1e6+1
f(i) = g(i) + i*2+5;
i=i+1;
if mod(i,1000)==0 % //let's save our state every 1000 iterations
save('checkpoint.mat','f','i');
end
end
delete('checkpoint.mat') % //make sure to remove it when we're done!
This allows you to quit your code midway through processing without losing all of that computation time. Deciding when and how often to checkpoint is the balance between performance and lost time!
Sample Code Implementation
Your Sample code would need to be updated as follows:
function fmain
sub1done=false; % //These really wouldn't be necessary if each function returns
sub2done=false; % //something, you could just check if the return exists
sub3done=false;
if exist('checkpoint_main.mat')==2, load('checkpoint_main.mat');end
if ~sub1done
fprintf('Entering fsub1\n');
fsub1()
fprintf('Finished with fsub1\n');
sub1done=true;
save('checkpoint_main.mat');
end
if ~sub2done
fprintf('Entering fsub2\n');
fsub2()
fprintf('Finished with fsub2\n');
sub2done=true;
save('checkpoint_main.mat');
end
if ~sub3done
fprintf('Entering fsub3\n');
fsub3()
fprintf('Finished with fsub3\n');
sub3done=true;
save('checkpoint_main.mat');
end
delete('checkpoint_main.mat');
end
function fsub2
subsub21_done=false;subsub22_done=false;...subsub29_done=false;
if exist('checkpoint_fsub2')==2, load('checkpoint_fsub2');end
if ~subsub21_done
fprintf('\tEntering fsubsub21\n');
fsubsub21
fprintf('\tFinished with fsubsub21\n');
subsub21_done=true;
save('checkpoint_fsub2.mat');
end
...
if ~subsub29_done
fprintf('\tEntering fsubsub29\n');
fsubsub29
fprintf('\tFinished with fsubsub29\n');
subsub29_done=true;
save('checkpoint_fsub2.mat');
end
delete('checkpoint_fsub2.mat');
end
function fsubsub29
subsubsub291_done=false;...subsubsub299_done=false;
if exist('checkpoint_fsubsub29.mat')==2,load('checkpoint_fsubsub29.mat');end
if ~subsubsub291_done
fprintf('\t\tEntering fsubsubsub291\n');
fsubsubsub291
fprintf('\t\tFinished with fsubsubsub291\n');
subsubsub291_done=true;
save('checkpoint_fsubsub29.mat');
end
if ~subsubsub292_done
fprintf('\t\tEntering fsubsubsub292\n');
fsubsubsub292% The break may occur in here
fprintf('\t\tFinished with fsubsubsub292\n')
subsubsub292_done=true;
save(checkpoint_fsubsub29.mat');
end
delete('checkpoint_fsubsub29.mat');
end
So in this structure if you restarted the program after it was killed it would resume back to the last saved checkpoint. So for example if the program died in subsubsub291, the program would skip fsub1 altogether, just loading the result. And then it would skip subsub21 all the way down to subsub29 where it would enter subsub29. Then it would skip subsubsub291 and enter 292 where it left off, having loaded all of the variables in that workspace and in previous workspaces. So if you backed out of 292 into 29 you would have the same workspace as if the code just ran. Note that this will also print a nice tree structure as it enters and exits functions to help debug execution order.
Reference:
https://wiki.hpcc.msu.edu/pages/viewpage.action?pageId=14781653
After a bit of googling, I found that using putvar (custom function from here: http://au.mathworks.com/matlabcentral/fileexchange/27106-putvar--uigetvar ) solved this.
I did some research into this and couldn't really find anything, so if this is a repetitive question I apologize. but anyway I have made a CCB file in CocosBuilder and I would like to start the timeline, for example, at one second instead of playing from the beginning. Is there a way to do this? Thanks for the help guys.
Edit: i would like this to be done in the code.
I am using 2.2.1 Cocos2DX version. I think there is no option to play it from given interval. But you can tweak yourself to get it done. (Not simple one)
You have to go to CCBAnimationManager and there you get "mNodeSequences".
It is dictionary and you get difference properties there like "rotation position etc..."
values there.
Internally AnimationManager reads this value (These values are specified in your CCB)
and puts in runAction queue.
So you have to break it as you want.(Ex. 5 min timeline you have. But you want to start
from 1 min then you have run first 1 min Actions without delay and for remaining you
have properly calculate tween intervals.
It's long procedure and needs calculation. If you don't know any other simpler way try this. If you know pls let us know (Post it).
All,
Is there a way to have a minimum time to keep a stream open before it closes? For some reason, my stream is closing prematurely which is causing errors elsewhere. I need to keep it open to make sure ALL of the data is gathered, and then it can run the other code.
Thanks,
James
In the case that someone falls upon this question later, I ended up creating nested if statements to pull it off.
Basically, there is one statement that checks if the end tag is not found (for my code, the END of the ENTIRE data that I should be receiving is </SessionData> - So, I did if([outputString rangeOfString:#"</SessionData>"].location == NSNotFound). I created a string called totalOutput that would have the outputString added onto the end of totalOutput until the </SessionData> is found.
If anyone ever needs help, just go ahead and comment on here and I can give more information.