Hello Everyone

I am currently working on fMRI data analysis using the TDT toolbox. Specifically, I am conducting SVR searchlight MVPA on the beta values extracted from the whole brain of 24 participants.

During the searchlight analysis, I encountered warnings in MATLAB, such as:

```
searchlight: 56000/185405, time to go: 00:09:15, time running: 00:04:02, finish: 2024/01/03 17:43:26
warnings: decoding_transform_results.m tried to calculate the output measure cfg.results.output='corr' and returned nan. This might be because one part of your data (e.g. a voxel value) is nan.
```

These warnings result in most of the values in ‘`results.corr.output`

’ being NaN, while the remaining values are 1. I am puzzled by this issue as the original data’s beta values for each voxel in the whole brain are not NaN. Interestingly, when I increased the number of participants to 31 and reran the searchlight MVPA, no such warnings appeared, and the results in ‘results.corr.output’ were normal without NaN values. I am unsure about the cause of this discrepancy and would appreciate any insights you may have.

The second issue pertains to the ‘`decoding statistics.m`

’ function. After completing 1000 permutation tests, I encountered the following error during decoding statistics:

```
**Undefined function or variable 'nanind'**
**ERROR decoding statistics (line 268)**
**p(nanind) = NaN**
```

Although the script continues to run if I skip line 268, the resulting ‘`stats_corr_permutation_z_right.nii`

’ image cannot be read. I am uncertain about the appropriate resolution for this error and would be grateful for any guidance you can provide.