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dparsf工作目录无法选定

Submitted by ljhswy on
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dear chaogan， 我在matlab2010b里装载了dparsf2.0，但是打开以后点选工作路径的时候弹出提示框按ok之后没有反应，命令行出现如下字段： ??? Attempt to reference field of non-structure array. Error in ==> DPARSF>btnSelectWorkingDir_Callback at 247 theDir =handles.Cfg.WorkingDir; Error in ==> gui_mainfcn at 96 feval(varargin{:}); Error in ==> DPARSF at 41 gui_mainfcn(gui_State, varargin{:});

运行DPARSFA 不停跳出以下提示，并且对spm的调用比平常要慢

Submitted by insular on
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Warning: The fourth output, VERSN, of FILEPARTS will be removed in a future release. > In fileparts at 35 In spm_slice_timing at 188 In spm_run_st at 25 In matlabbatch/private/cfg_run_cm at 29 In cfg_util>local_runcj at 1363 In cfg_util at 699 In spm_jobman at 207 In DPARSFA_run at 236 In DPARSFA>pushbuttonRun_Callback at 969 In gui_mainfcn at 96 In DPARSFA at 30

Be cautious when regressing out covariates

Submitted by zangzx on
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Be cautious when regressing out covariates. We simulated three random timecourses X, Y and Z that are normally distributed to perform linear regression. Let Y to be the ROI timecorese and X, Z to be the covariates. The regression coefficients and residual after two-factor linear regression are extremely same with that of two Unary linear regressions. The results are as bellow:

关于重复测定的随访资料分析

Submitted by Qiang on
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严老师好： 我同您请教一个有关同一批受试者在不同时间点接受rfMRI检测的问题。应该如何分析会比较好一些。REST好像没有重复测定的方差分析，在分析VBM 时，有的文章使用前后两次时间点相减得到新的差异影响，然后比较差异影像在正常和患者的差别，不知Reho，FC和ALFF等指标可不可以使用这种分析。 谢谢，期待你的指教！

ALFF的问题

Submitted by Champagne on
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各位老师好，请教两个关于ALFF的问题，谢谢： 1、我查看了REST里面的ALFF源程序，计算能量谱 = 2 * 频谱的平方 / N，请问这里为什么要除以N？ 2、左西年老师的文章《The oscillating brain: Complex and reliable》中Fig1和公式（1）提到ALFF是Sum of amplitudes of PSD，而源程序里ALFF貌似是Mean of amplitudes of PSD，应该以哪个为准？
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