# Latest **URL:** https://www.askpbs.org/latest.md [Latest](https://www.askpbs.org/latest.md) · [Categories](https://www.askpbs.org/categories.md) --- ## [Welcome to Discourse](https://www.askpbs.org/t/welcome-to-discourse/7)
**Author:** [@system](https://www.askpbs.org/u/system)\ **Replies:** 0\ **Last updated:** [July 16, 2020, 9:08pm UTC](https://www.askpbs.org/t/welcome-to-discourse/7 "2020-07-16T21:08:58Z")
Welcome to the Dartmouth College Department of Psychological & Brain Sciences Discourse page. Feel free to ask questions and participate in discussions pertaining to educational courses (e.g., DartBrains, Naturalistic-Da… --- ## [Timing of Sherlock movie](https://www.askpbs.org/t/timing-of-sherlock-movie/257)
**Author:** [@micha.engeser](https://www.askpbs.org/u/micha.engeser)\ **Replies:** 0\ **Last updated:** [May 28, 2026, 12:04pm UTC](https://www.askpbs.org/t/timing-of-sherlock-movie/257 "2026-05-28T12:04:26Z")
Hi there Many thanks for building these great tutorials! I have a question about the timing of the Sherlock movie. In the dataset description, it says the fMRI data were cropped to be aligned with the start of the movi… --- ## [How to create file directory and load dataset in Python?](https://www.askpbs.org/t/how-to-create-file-directory-and-load-dataset-in-python/253)
**Author:** [@jasondavis4422](https://www.askpbs.org/u/jasondavis4422)\ **Replies:** 0\ **Last updated:** [February 12, 2025, 3:21am UTC](https://www.askpbs.org/t/how-to-create-file-directory-and-load-dataset-in-python/253 "2025-02-12T03:21:19Z")
If I wanted to load a NIFTI file to analyze for my own project, how do I do so on the server? I understand the load function loads an image, but how can I loop through each subject and create a set of files that I can qu… --- ## [Have there been issues in downloading & using the nltools library for neuroimaging analysis?](https://www.askpbs.org/t/have-there-been-issues-in-downloading-using-the-nltools-library-for-neuroimaging-analysis/252)
**Author:** [@jasondavis4422](https://www.askpbs.org/u/jasondavis4422)\ **Replies:** 0\ **Last updated:** [February 12, 2025, 3:08am UTC](https://www.askpbs.org/t/have-there-been-issues-in-downloading-using-the-nltools-library-for-neuroimaging-analysis/252 "2025-02-12T03:08:16Z")
I have tried to use nltools in my conda environment to do some of the fMRI analysis in PSYC 60 via Python, but it is the one package that is not working for me. numpy, scikit-learn, and seaborn, for example, work, but th… --- ## [How should I add covariance for inter-subject similarity analysis?](https://www.askpbs.org/t/how-should-i-add-covariance-for-inter-subject-similarity-analysis/225)
**Author:** [@Qunjun](https://www.askpbs.org/u/Qunjun)\ **Replies:** 1\ **Last updated:** [May 6, 2024, 2:02pm UTC](https://www.askpbs.org/t/how-should-i-add-covariance-for-inter-subject-similarity-analysis/225 "2024-05-06T14:02:49Z")
Hi nltools experts, I have collected a clinical dataset containing the patients’ resting-state fMRI and the clinical symptom score (evaluated by clinical doctors), and I aim to examine the shared pattern between the bra… --- ## ["ComplexWarning" error message](https://www.askpbs.org/t/complexwarning-error-message/244)
**Author:** [@gchao320](https://www.askpbs.org/u/gchao320)\ **Replies:** 0\ **Last updated:** [April 10, 2024, 9:56pm UTC](https://www.askpbs.org/t/complexwarning-error-message/244 "2024-04-10T21:56:02Z")
I keep getting an error message for “casting complex numbers.” I’m trying to generate a signal and the perform a discrete Fourier transform: first, define the signal, which consists of sine waves with different frequenc… --- ## [Where do we have PBS logo?](https://www.askpbs.org/t/where-do-we-have-pbs-logo/242)
**Author:** [@yarikoptic](https://www.askpbs.org/u/yarikoptic)\ **Replies:** 0\ **Last updated:** [April 7, 2024, 10:24pm UTC](https://www.askpbs.org/t/where-do-we-have-pbs-logo/242 "2024-04-07T22:24:43Z")
IIRC we got mugs and tshirts with it but I fail to find a version of it online --- ## [Unable to access data after download](https://www.askpbs.org/t/unable-to-access-data-after-download/155)
**Author:** [@Gargi](https://www.askpbs.org/u/Gargi)\ **Replies:** 9\ **Last updated:** [December 21, 2023, 9:49am UTC](https://www.askpbs.org/t/unable-to-access-data-after-download/155 "2023-12-21T09:49:01Z")
In the naturalistic data tutorial, I am unable to access the data using the datalad get command. It is showing me the following error: \[ERROR \] No dataset found at ‘/home/gargi/Gargi/Naturalistic\_Tut’. Specify a datas… --- ## [Sherlock data - recall onset times](https://www.askpbs.org/t/sherlock-data-recall-onset-times/227)
**Author:** [@tbotch](https://www.askpbs.org/u/tbotch)\ **Replies:** 0\ **Last updated:** [June 19, 2023, 9:14pm UTC](https://www.askpbs.org/t/sherlock-data-recall-onset-times/227 "2023-06-19T21:14:56Z")
Hello! I noticed a small problem with the recall onset times (Sherlock\_Recall\_Scene\_n50\_Onsets.csv) found on the data download page. Specifically, the onset times for Subject 1 are written as the “movie” onsets instead… --- ## [I'm getting an import error for interactive plots](https://www.askpbs.org/t/im-getting-an-import-error-for-interactive-plots/219)
**Author:** [@Steve\_Sizzou](https://www.askpbs.org/u/Steve_Sizzou)\ **Replies:** 0\ **Last updated:** [March 18, 2023, 7:09am UTC](https://www.askpbs.org/t/im-getting-an-import-error-for-interactive-plots/219 "2023-03-18T07:09:21Z")
Hi! I’m trying to do some interactive plots, but I keep getting this import error: ImportError: ipywidgets\>=5.2.2 is required for interactive plotting. I already have an up to date version of ipywidgets: ipywidgets==8.… --- ## ['load\_bids\_event' not working](https://www.askpbs.org/t/load-bids-event-not-working/210)
**Author:** [@Gargi](https://www.askpbs.org/u/Gargi)\ **Replies:** 0\ **Last updated:** [October 29, 2022, 3:22pm UTC](https://www.askpbs.org/t/load-bids-event-not-working/210 "2022-10-29T15:22:48Z")
Hi, I am trying to apply the load\_bids\_event and getting an error that I can’t figure out… I have gone through the link below and tried both the absolute and relative path but it is not working… When I used the relati… --- ## [ISRSA - Parcellation mask and timeseries calculation](https://www.askpbs.org/t/isrsa-parcellation-mask-and-timeseries-calculation/208)
**Author:** [@ozgezer](https://www.askpbs.org/u/ozgezer)\ **Replies:** 0\ **Last updated:** [October 27, 2022, 11:01am UTC](https://www.askpbs.org/t/isrsa-parcellation-mask-and-timeseries-calculation/208 "2022-10-27T11:01:32Z")
Hi there, I have been going through the ISRSA tutorial and I have an issue at the part named Applying a parcellation mask and calculating nodewise timeseries. I have attached the heatmap I got, mine seems to have too ma… --- ## [Input Data-nifti vs. npy file?](https://www.askpbs.org/t/input-data-nifti-vs-npy-file/207)
**Author:** [@sgranger](https://www.askpbs.org/u/sgranger)\ **Replies:** 0\ **Last updated:** [October 26, 2022, 7:24pm UTC](https://www.askpbs.org/t/input-data-nifti-vs-npy-file/207 "2022-10-26T19:24:09Z")
Hello, I am just starting to use the Event segmentation tutorial and am having a hard time understanding the contents of the “0.Load Angular Gyrus data” section. If I wanted to upload a nifti file of event encoding dat… --- ## [ISC - Creating csv files within each ROI](https://www.askpbs.org/t/isc-creating-csv-files-within-each-roi/179)
**Author:** [@ozgezer](https://www.askpbs.org/u/ozgezer)\ **Replies:** 11\ **Last updated:** [July 18, 2022, 5:39pm UTC](https://www.askpbs.org/t/isc-creating-csv-files-within-each-roi/179 "2022-07-18T17:39:49Z")
Hi there, I had achieved to run all ISC and IS-RSA tutorial without errors, and I am trying to run ISC with my pilot data. However, I couldn’t run the following code to create my own csv files. Sorry if I am missing out… --- ## [FYI: HOWTOs for DataLad (git-annex) on discovery HPC](https://www.askpbs.org/t/fyi-howtos-for-datalad-git-annex-on-discovery-hpc/197)
**Author:** [@yarikoptic](https://www.askpbs.org/u/yarikoptic)\ **Replies:** 0\ **Last updated:** [July 15, 2022, 3:51pm UTC](https://www.askpbs.org/t/fyi-howtos-for-datalad-git-annex-on-discovery-hpc/197 "2022-07-15T15:51:23Z")
Data access - Dartmouth Brain Imaging Center Handbook vX.X.X-dev contains instructions for a way to make git-annex (needs recent version) work nicely (without any adjusted branches) on discovery HPC filesystem which uses… --- ## [Class Videos to accompany the dartbrains?](https://www.askpbs.org/t/class-videos-to-accompany-the-dartbrains/196)
**Author:** [@dheerajtls](https://www.askpbs.org/u/dheerajtls)\ **Replies:** 1\ **Last updated:** [June 21, 2022, 8:38pm UTC](https://www.askpbs.org/t/class-videos-to-accompany-the-dartbrains/196 "2022-06-21T20:38:44Z")
Dear Dr. Chang, Hope you are doing great! I am going through the book for my thesis research and I want to know if the lectures are available on youtube or any other forum? Lastly, Great book and thanks for making it op… --- ## [Walltime on SLURM](https://www.askpbs.org/t/walltime-on-slurm/194)
**Author:** [@ssadhukha](https://www.askpbs.org/u/ssadhukha)\ **Replies:** 1\ **Last updated:** [May 10, 2022, 3:20pm UTC](https://www.askpbs.org/t/walltime-on-slurm/194 "2022-05-10T15:20:03Z")
Hi all, I may have underestimated how much time my jobs would take to run and was wondering if it’s possible to increase walltime after having started running jobs on SLURM? --- ## [Poster submission format](https://www.askpbs.org/t/poster-submission-format/190)
**Author:** [@ericabusch](https://www.askpbs.org/u/ericabusch)\ **Replies:** 1\ **Last updated:** [April 16, 2022, 8:42pm UTC](https://www.askpbs.org/t/poster-submission-format/190 "2022-04-16T20:42:52Z")
Hi there, Is the poster format for the data competition the same as the SANS conference format (https://socialaffectiveneuro.org/poster-guidelines/)? If so, does it need to be submitted to SANS as well, and is it due by… --- ## [Deadline extension?](https://www.askpbs.org/t/deadline-extension/189)
**Author:** [@neo](https://www.askpbs.org/u/neo)\ **Replies:** 2\ **Last updated:** [April 16, 2022, 8:31pm UTC](https://www.askpbs.org/t/deadline-extension/189 "2022-04-16T20:31:21Z")
Hi, thanks for organizing this competition. Just wonder if it’s possible for us to have another extension, say one or two weeks. I learned about this very recently and haven’t dived deep enough. I believe all participant… --- ## [How do I change ACL permissions on DartFS?](https://www.askpbs.org/t/how-do-i-change-acl-permissions-on-dartfs/185)
**Author:** [@ljchang](https://www.askpbs.org/u/ljchang)\ **Replies:** 0\ **Last updated:** [April 4, 2022, 3:45pm UTC](https://www.askpbs.org/t/how-do-i-change-acl-permissions-on-dartfs/185 "2022-04-04T15:45:54Z")
DartFS does not have standard POSIX permissions, rather it uses Access Control Lists (ACL), which has a more sophisticated and comprehensive rules. An ACL in NFSv4 is a list of rules setting permissions on files or dire… --- ## [S3 AU data timepoints](https://www.askpbs.org/t/s3-au-data-timepoints/181)
**Author:** [@jahchwe](https://www.askpbs.org/u/jahchwe)\ **Replies:** 1\ **Last updated:** [March 28, 2022, 1:33pm UTC](https://www.askpbs.org/t/s3-au-data-timepoints/181 "2022-03-28T13:33:30Z")
Hello, I am working with a team that is trying to compare the fMRI data with the S3 facial action unit data and S4 emotion ratings data. We’re finding that the facial action data has 1359 timepoints sampled at 0.5Hz/2 … --- ## [How do I run a jupyter notebook server on discovery?](https://www.askpbs.org/t/how-do-i-run-a-jupyter-notebook-server-on-discovery/37)
**Author:** [@ljchang](https://www.askpbs.org/u/ljchang)\ **Replies:** 2\ **Last updated:** [March 1, 2022, 8:02pm UTC](https://www.askpbs.org/t/how-do-i-run-a-jupyter-notebook-server-on-discovery/37 "2022-03-01T20:02:37Z")
I would like to launch a jupyter server as an interactive job and ssh tunnel into the server so that I can execute code in the browser of my local computer. --- ## [How do I submit an interactive job?](https://www.askpbs.org/t/how-do-i-submit-an-interactive-job/36)
**Author:** [@ljchang](https://www.askpbs.org/u/ljchang)\ **Replies:** 2\ **Last updated:** [February 22, 2022, 11:18pm UTC](https://www.askpbs.org/t/how-do-i-submit-an-interactive-job/36 "2022-02-22T23:18:45Z")
When testing your code, sometimes it can be helpful to submit an interactive job to the scheduler. Make sure that you don’t test computationally demanding jobs on the head node (i.e., the one you log into to submit jobs… --- ## [Datalad issues accessing denoised data](https://www.askpbs.org/t/datalad-issues-accessing-denoised-data/175)
**Author:** [@ljchang](https://www.askpbs.org/u/ljchang)\ **Replies:** 1\ **Last updated:** [February 16, 2022, 8:15pm UTC](https://www.askpbs.org/t/datalad-issues-accessing-denoised-data/175 "2022-02-16T20:15:16Z")
Some people have reported issues accessing the denoised data via datalad. For example, It looks like the fmriprep preprocessed data is working ok and that this is specifically an issue with the denoised version. We… --- ## [RSA with nltools](https://www.askpbs.org/t/rsa-with-nltools/166)
**Author:** [@Karen](https://www.askpbs.org/u/Karen)\ **Replies:** 1\ **Last updated:** [August 25, 2021, 4:03pm UTC](https://www.askpbs.org/t/rsa-with-nltools/166 "2021-08-25T16:03:37Z")
Hi everyone, I’m new to RSA and have a question about testing a specific hypothesis about the representational structure of the data. I followed the steps on the RSA page. I first created an adjacency matrix, then used … --- ## [Requirements.txt](https://www.askpbs.org/t/requirements-txt/162)
**Author:** [@Masoud](https://www.askpbs.org/u/Masoud)\ **Replies:** 3\ **Last updated:** [July 15, 2021, 5:15pm UTC](https://www.askpbs.org/t/requirements-txt/162 "2021-07-15T17:15:13Z")
Hi The code for downloading the data does not work and there are two pakeges that I don’t know about them. “nipype” two times has been written. Of" pynv " I cound not find anything about on the internet. Is there this… --- ## [How do I get access to data and code if I'm not a Dartmouth Student?](https://www.askpbs.org/t/how-do-i-get-access-to-data-and-code-if-im-not-a-dartmouth-student/160)
**Author:** [@ljchang](https://www.askpbs.org/u/ljchang)\ **Replies:** 0\ **Last updated:** [July 13, 2021, 1:40pm UTC](https://www.askpbs.org/t/how-do-i-get-access-to-data-and-code-if-im-not-a-dartmouth-student/160 "2021-07-13T13:40:41Z")
If you are taking the Dartbrains course at Dartmouth, we provide a jupyterhub server that has all of the data, software, and notebook preinstalled. However, I frequently get emails about how to access everything if you a… --- ## [Running Interactive GPU Job in SLURM](https://www.askpbs.org/t/running-interactive-gpu-job-in-slurm/159)
**Author:** [@LandryB](https://www.askpbs.org/u/LandryB)\ **Replies:** 3\ **Last updated:** [July 14, 2021, 8:02pm UTC](https://www.askpbs.org/t/running-interactive-gpu-job-in-slurm/159 "2021-07-14T20:02:06Z")
Hello all - I am adjusting to the new SLURM situation. Does anyone have any ideas about how to request a GPU in an interactive job? Running an interactive job is straightforward: srun --pty /bin/bash, and here I am tol… --- ## [Where do I find listing for apartment/house rentals](https://www.askpbs.org/t/where-do-i-find-listing-for-apartment-house-rentals/157)
**Author:** [@ljchang](https://www.askpbs.org/u/ljchang)\ **Replies:** 2\ **Last updated:** [June 10, 2021, 4:36pm UTC](https://www.askpbs.org/t/where-do-i-find-listing-for-apartment-house-rentals/157 "2021-06-10T16:36:18Z")
What resources (e.g., websites, listservs, etc) would you recommend for people looking to relocate to the upper valley? --- ## [Extracting Regions of Interest](https://www.askpbs.org/t/extracting-regions-of-interest/150)
**Author:** [@Kodiweera](https://www.askpbs.org/u/Kodiweera)\ **Replies:** 5\ **Last updated:** [April 15, 2021, 10:29pm UTC](https://www.askpbs.org/t/extracting-regions-of-interest/150 "2021-04-15T22:29:27Z")
Hi, Given the mask, what’s the best tool out there to extract the region covered by the mask? Thanks! [Next page](https://www.askpbs.org/latest.md?page=1)