t-test degrees of freedom

Submitted by Marieke on Fri, 08/30/2019 - 13:13

Hi you all,

I am using Matlab Version 2019a, and GraphVar 2.02. I am calculating group comparisons with 4 subgroups that arise when combining 2 factors (factor A and B) so that I am calculating e.g., A0 + B0 vs. A1 + B0. Hence, I have 6 comparisons in total. My total n is 211, but my subgroups have an n of 60, 47, 24, and 80, respectively.

Upon analyzing the output, I encountered two difficulties:

 

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DPARSFA4.3功能连接报错

Submitted by lyx on Tue, 08/27/2019 - 01:29

严老师你好，在进行猴子的功能连接时出现报错如下图所示:

请问是没有配准么，怎么解决，感谢老师

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关于slice timing阶段的问题

Submitted by spl1234 on Mon, 08/26/2019 - 12:20

各位老师，你们好：

我在用DPARSF进行预处理的时候遇到了一个问题：

实验数据大部分被试的slice number = 33，TR = 2s，然而在数据中存在一小部分被试的slice number = 38，TR = 2.303s，我想请问一下，这样该怎么处理呢？我可以将这个数据按照slice number = 33，TR = 2s和slice number = 38，TR = 2.303s分为两组然后分开进行slice timing步骤的处理，再将时间校正后的两组数据合起来进行余下的预处理步骤吗？还是说两组数据所有的预处理步骤都需要分开做呢？想请问一下这两种方式哪个是正确的呢？

 

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DPARSF4.3（DPABI）预处理报错

Submitted by lyx on Thu, 08/22/2019 - 01:29

严老师您好，我在用DPARSF4.3（DPABI）进行猴子数据预处理时出现报错。已经生成了T1ImgSegment文件夹，准备生成T1ImgSegmentCovs文件夹时（即已经完成分割后准备进行协变量去除时）报错。报错如下，望您指正：

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Temporal Dynamic Analysis

Submitted by jdronse on Tue, 08/20/2019 - 14:37

Dear DPABI community,

I have some questions regarding temporal dynamic analysis. I have two groups of subjects, AD patients and healthy controls. I want to compare the patterns of dynamic r-fMRI indices and and their concordance.

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The R-fMRI Course V3.0 Is Released

Submitted by YAN Chao-Gan on Mon, 08/19/2019 - 01:45
Dear Colleagues, 
 
We are pleased to announce the release of The R-fMRI Course V3.0 (http://rfmri.org/Course)!
 

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The R-fMRI Course V2

Submitted by YAN Chao-Gan on Sat, 08/17/2019 - 11:01

 

 

The R-fMRI Course V2.1

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Error using tlstsq

Submitted by Marieke on Tue, 08/13/2019 - 12:31

Hi,

I repeatedly encounter an error, irrespective of measure, binary or weighted measures, and irrespective whether graph metrics are normalized with random networks. I attach the workspace I would prefer to use as well as the error code. :)

I would be very grateful for any help! :)

I am using MATLAB R2019a, we are calculating with 211 subjects. Here, I only selected 11 ROIs and 11 thresholds.

Thank you very much!

Marieke

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R-fMRI图像翻转问题

Submitted by wenwen on Sun, 08/11/2019 - 03:51

严老师：

     您好！

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