help

Hi everybody, When I'm regressing out covariates Matlab returns the following to me: Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 1.034803e-027. > In rest_RegressOutCovariates>Brain4D_RegressOutCovariables at 92 In rest_RegressOutCovariates at 54 In rest_RegressOutCovariates_gui>Run_Callback at 238 In gui_mainfcn at 96

您好，我用dparsf得到alff结果进行两样本t检验时发现还有脑室内的信号增强还有很多undefined的脑区（自己做的mask和brainmask均有），这时候应该怎么处理？ 另外，利用两组数据单样本t检验结果做mask的表达式是不是(i1>0)+(i2>0)>0，用~表示不等于 image calculator出错，求准确表达式 不胜感激！

 I've just used the regress out covariates utility by following the online course material, however, I am confused by the output.  I was expecting another time series all with the suffix covremoved but instead all I get is a text file called Cov.txt ?  There were no error messages.  Where are the modified data?

Thanks
Anna

亲爱滴们：

今天碰到这样一个问题，焦头烂额：
由于这批数据需要手动配准，所以我的处理流程如下：
1. 用dparsf批处理至realign。
2.用spm做coregister.
3.用AFNI转换格式后做Normalize
4.转换个格式后，将得到的EPI相文件放入FunImgNormalized文件夹。
然后启动dparsf，
先跳过Smooth做的ReHo，很顺利，detrend, filter, reho...没有任何问题。
然后继续用dparsf做alff以及falff，操作过程如下：
    -matlab下输入dparsf
    -依次去掉smooth前所有的勾
    -选择工作目录
   - 输入时间点190
   - 选择自定义模板 

 I am running the Granger Causality Analysis script contained in the REST 2007 toolbox. Unfortunately, I am encountering some errors.

The value of the generated GCA Map  is zero in every voxel.