Dear John & VBM experts,
I have two question regarding HDW:
1) When running spm_hdw I get the following warning during the differential
bias field correction step :
Warning: Matrix is singular, close to singular or badly scaled.
Results may be inaccurate. RCOND = NaN.
> In spm_hdw>bias_correction at 208
In spm_hdw>run_warping at 30
In spm_hdw at 14
In spm_jobman>run_struct1 at 1585
In spm_jobman>run_struct1 at 1595
In spm_jobman>run_struct1 at 1595
In spm_jobman>run_job at 480
In spm_jobman at 89
is this a serious problem that may affect my results or can I safely ignore it.
2) Is there any possibility to parallelize spm_warp.c by means of OpenMP,
e.g. using a simple #pragma omp parallel directive at some for loop in the
source code?
Any help would be greatly appreciated!
Best,
Nikos
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