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Hi FS experts,
I want to find clusters showing an association between cortical measures and behavior x6 (sex, age and variables x1-x5 as covariates).
My FSGD file looks like: GroupDescriptorFile 1 Class Male Class Female Variables x1 x2 x3 x4 x5 x6 Age
Input S001 Male 120 103 109 124 113 94 113 36
Input S003 Male 91 101 86 103 109 95 96 29
Input S004 Male 104 116 110 96 115 108 112 39
Input S005 Female 116 114 103 127 115 106 118 32
Input S006 Female 93 100 90 100 117 90 97 23
Input S008 Male 70 80 80 66 78 83 71 40
Input S009 Female 125 114 115 125 118 104 124 45
Input S010 Female 96 91 93 101 91 92 94 42
Input S011 Male 104 92 97 111 84 103 98 45
Input S012 Female 79 81 90 74 82 80 78 22
Input S014 Male 120 94 118 114 105 87 107 44
Input S015 Female 94 86 92 100 80 93 88 29
Input S016 Male 98 92 107 88 95 90 95 33
Input S017 Female 96 100 112 83 95 104 99 21
Input S018 Male 98 93 96 103 104 87 96 42
Input S019 Female 105 120 99 110 113 114 114 26
Input S020 Female 105 107 104 103 113 100 109 27
Input S022 Female 116 98 115 111 111 89 109 25
Input S023 Female 98 91 94 105 86 96 94 21
Input S024 Male 116 101 119 105 90 112 111 43
Input S025 Female 143 102 134 129 110 95 120 21
Input S028 Female 72 80 77 71 82 78 71 41
Input S029 Male 104 100 116 92 94 105 104 25
Input S030 Female 120 96 115 116 103 92 109 18
Input S031 Female 114 103 111 111 99 105 112 29
Input S033 Male 121 99 108 127 104 96 111 20
Input S035 Male 112 104 104 115 103 103 110 20
Input S036 Female 111 103 103 113 106 98 109 28
Input S037 Male 108 91 108 103 92 91 99 30
Input S038 Male 103 99 102 102 117 89 103 18
Input S039 Male 106 114 116 94 112 107 112 21
Input S040 Male 99 98 97 102 94 100 99 41
Input S041 Male 103 109 97 109 110 103 109 26 My contrast file looks like: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.5 0.5 0 0
After I run mri_glmfit command, I get following error:
ERROR: matrix is ill-conditioned or badly scaled, condno = 385372
--------------------------------
Possible problem with experimental design:
Check for duplicate entries and/or lack of range of
continuous variables within a class.
I would really appreciate any help in figuring out this issue.
Thanks, MJ