Show all posts by user
Community news & Announcements
Re: Grating Edges - 4 days ago
If it is a static grating, you may be able to edit pixels so that the edge can be vaguer. As long as you are using a moving grating, however, I do not think this can be easily solved. You may have to go back to the LED display, if this is a big issue.by Jaewon - Questions and Answers
Re: Issue with Photodiode Tuner in MonkeyLogic - 4 weeks ago
Ah, you were talking about temporal resolution. Yes, the current implementation is tied to the refresh rate, not to violate more important time constraints.by Jaewon - Questions and Answers
Re: Issue with Photodiode Tuner in MonkeyLogic - 5 weeks ago
I do not know what kind of touch detection method your device is using, but the refresh rate of the monitor has nothing to do with the precision of touch position. The eventcodes are also sent out via the NI board, if "Behavioral Codes" is configured. You can use that output, I guess.by Jaewon - Questions and Answers
Re: Issue with Photodiode Tuner in MonkeyLogic - 5 weeks ago
First of all, the photodiode tuner is the tool of which window you captured and attached in your first message. The white square presented in the corner of the subject screen is called the photodiode trigger. The trigger works whether you run the tuner or not. What I would also like to see is your code that does the calculation (i.e., how the calculation is done). I do not need any statistics.by Jaewon - Questions and Answers
Re: Issue with Photodiode Tuner in MonkeyLogic - 5 weeks ago
I think you have the answer, not me, since you have tested with the photodiode to find it out. If what you ask about is how NIMH ML is designed, please show me your code and how you calculate the difference.by Jaewon - Questions and Answers
Re: Remote control - 5 weeks ago
Instead, you can run tasks on a desktop with two monitors but just with long cables. If you can give up a couple of things like "access the control screen" or "in real time", you can monitor the task progress with the alert function even on your smartphone. You need a wifi connection, though, which will drain battery faster.by Jaewon - Questions and Answers
Re: Issue with Photodiode Tuner in MonkeyLogic - 5 weeks ago
Try testing with a lower resolution and a slower refresh rate, like 1024 x 768 px and 60 Hz. And is your subject screen the main display of the computer?by Jaewon - Questions and Answers
Re: Issue with Photodiode Tuner in MonkeyLogic - 5 weeks ago
The tuner is working as I wrote. It does not support NVIDA and I programmed it to show those messages. You are just not getting signals from the photodiode. Check if it is working properly.by Jaewon - Questions and Answers
Re: Controlling an Arduino-based olfactometer via serial communication in MonkeyLogic - 3 months ago
If your olfactometer is a commercial product, the manufacturer probably has the instructions/tools (or even MATLAB scripts) to control it. You should talk with them first. For serial devices, NIMH ML does not collect data automatically in the background. You should handle everything yourself, from initializing the olfactometer to reading and saving samples, by writing some code in the alert fuby Jaewon - Questions and Answers
Re: Increasing the buffer size for NI DAQ - 3 months ago
You need to reduce the workload of your computer or get a faster computer. The current buffer size is already large enough. If your machine cannot keep up with the acquisition, a larger buffer will not help much.by Jaewon - Questions and Answers
Re: RT from SingleTarget is earlier than scene start - 5 months ago
You did not make a mistake. You can get a negative RT, when your subject predicts the timing of a stimulus and makes a preemptive response to a very close target. I will provide more detailed explanation later, but simply speaking, there is a gap between the scene start time and the time when a stimulus show up on the screen. If the subject makes a response during this gap, you get a negativeby Jaewon - Questions and Answers
Re: General keyboard input during task - 5 months ago
I do not understand what you are asking about. You can just tell the user to type in something. Are you talking about something like this? https://monkeylogic.nimh.nih.gov/board/read.php?3,2050by Jaewon - Questions and Answers
2.2.52 & 2.0.273 (Jul 9, 2025) - 6 months ago
* Changes in 2.2.52 (Jul 9, 2025) - Additional fix for the figure positioning with multimonitors - An option to display the touch cursor on the subject screenby Jaewon - News
Re: Troubleshooting Analog Input and External Push Button in MonkeyLogic - 6 months ago
Split the cable into two lines. Then feed one line to NIMH ML and the other to wherever you want.by Jaewon - Questions and Answers
Re: Index in position 1 exceeds array bounds - 6 months ago
It turned out that there were undeleted, old copies of NIMH ML on the disk and they were being executed inadvertently in this case.by Jaewon - Questions and Answers
Re: Index in position 1 exceeds array bounds - 6 months ago
If you have a data file from the interrupted session, can you send it to me?by Jaewon - Questions and Answers
Re: Index in position 1 exceeds array bounds - 6 months ago
If you could replicate the error within 30 minutes, there must be something in your test environment. Please explain how you tested. Were you running a real experiment or simulation?by Jaewon - Questions and Answers
Re: Troubleshooting Analog Input and External Push Button in MonkeyLogic - 6 months ago
"I tried using the general input, but it did not work." -> Please explain more details. "how can I integrate an external push button into MonkeyLogic?" -> Connect them to the NI board and assign to on the I/O menu.by Jaewon - Questions and Answers
Re: Index in position 1 exceeds array bounds - 6 months ago
Update your NIMH ML if you are not using the latest version.by Jaewon - Questions and Answers
Re: Use of Include using variable input - 7 months ago
You are trying to add a new variable to a static workspace. It does not work anywhere in MATLAB. You cannot insert a nested function dynamically, but you can define them all first and choose one dynamically. include('func1.m', 'func2.m', 'func3.m'); % each script must be a function. eval('func1'); I am glad to hear that NIMH ML is useful for you.by Jaewon - Questions and Answers
Re: Taking subject input via keyboard. - 7 months ago
There was no issue. Somesh's problem was because he did not copy a necessary file to his new task. Later I incorporated the file into the ML package and removed it from the task attached above, so now you need to update your NIMH ML to run the above task.by Jaewon - Questions and Answers
Re: touch mode is not working on subject screen - 7 months ago
Please be patient. I cannot just modify existing functions without considering how the changes will affect those who are already using them. Download the package again and try it. You need to add the following command to your timing file. https://monkeylogic.nimh.nih.gov/docs_RuntimeFunctions.html#showtouch showtouch(true); % v1 touch_.showcursor(true); % v2by Jaewon - Questions and Answers
Re: touch mode is not working on subject screen - 7 months ago
It seems that you programmed it as the touchscreen input, didn't you? Your device is a replacement of the mouse, not the touchscreen, so you should program it as such. The mouse input is supported only in Timing Script v2 (a.k.a., the scene framework). Use mouse_, instead of touch_. And do not forget to check on "Mouse / Key" in the .by Jaewon - Questions and Answers
Re: Scene5 does not terminate on fixation break before transition to Scene6 - 7 months ago
You did not provide the datafile, but I think I can tell what happened during the trial. It seems that your subject is very good at guessing the duration of the initial central fixation. You said you expected an error in Scene5 for the premature saccade. However, it does not occur there when the subject breaks the fixation very near to the end of the fixation hold, because SingleTarget does noby Jaewon - Questions and Answers
Re: How to draw a gray ring stimulus using MonkeyLogic Version 2? - 7 months ago
It is natural that small circles get pixelated. In addition, CircleGraphic does not do anti-aliasing, for fast graphic updates (e.g., animation). The pixelation may occur only on the control screen. Your subject screen is probably larger and you may not see it there. You do not have to use CircleGraphic. You can create the stimuli as CRC TaskObjects, which do anti-aliasing, and present themby Jaewon - Questions and Answers
Re: touch mode is not working on subject screen - 7 months ago
Okay. I thought you were talking about a Wacom display model. Are you running the task in the simulation mode, by any chance?by Jaewon - Questions and Answers
Re: touch mode is not working on subject screen - 7 months ago
Wacom is basically another computer, like a tablet. For the subject screen, you need a monitor controlled by your MonkeyLogic computer.by Jaewon - Questions and Answers
Re: Pseudorandomization in userloop file - 7 months ago
Your TrialRecord.User.random_num_list is not defined unless the if statement is executed.by Jaewon - Questions and Answers
Re: Ending acquisiton of touchdata early - 7 months ago
You are right. If you display something, it cannot be moved to the alert function.by Jaewon - Questions and Answers
Re: Ending acquisiton of touchdata early - 7 months ago
There is no way to stop data acquisition in the middle of a trial. I do not know how you detect the entrance of the next subject, but you can put the related code in the 'trial_start' hook of the alert function, instead of the timing script, and hold the task there until the next subject is detected. Then, there is no need to worry about the data accumulation, since data is not acquiby Jaewon - Questions and Answers