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help > RE: data mean adjustment
May 11, 2016 12:05 AM | Donald McLaren
RE: data mean adjustment
I would not be concerned about this
happening. The PPI terms are mean-centered as part of the code. The
higher the amplitude of the PPI regressors or the more events, the
more the DC shift will be in the data. The DC term is offset by the
constant term in the model.
Originally posted by Gina Joue:
Originally posted by Gina Joue:
Hiya,
Here is a sample SPM.mat for one subject and the commands:
xlvl = {'conCinsTrem0' 'conCinsTrem1' 'conCinsDrem0' 'conCinsDrem1' 'conIinsTrem0' 'conIinsTrem1' 'conIinsDrem0' 'conIinsDrem1'};
for i=1:length(xlvl)
xlvlPPI{i} = sprintf('PPI_%s',xlvl{i});
end
load('SPM.mat');
for c=1:length(xlvl)
cinds = find(~cellfun(@isempty, regexp(SPM.xX.name,sprintf(' %s',xlvl{c})))); % need to add space or will also match PPI_
pinds = find(~cellfun(@isempty, regexp(SPM.xX.name,xlvlPPI{c})));
for i=1:length(cinds)
figure(s*100+c*10+i)
plot(SPM.xX.X(1:178,cinds(i)))
hold on
plot(SPM.xX.X(1:178,pinds(i)),'r')
title(['sub' subj '\color{blue}' SPM.xX.name(cinds(i)) ' - ' '\color{red}' SPM.xX.name(pinds(i))])
end
end
Thank you, Donald!!
Gina
Here is a sample SPM.mat for one subject and the commands:
xlvl = {'conCinsTrem0' 'conCinsTrem1' 'conCinsDrem0' 'conCinsDrem1' 'conIinsTrem0' 'conIinsTrem1' 'conIinsDrem0' 'conIinsDrem1'};
for i=1:length(xlvl)
xlvlPPI{i} = sprintf('PPI_%s',xlvl{i});
end
load('SPM.mat');
for c=1:length(xlvl)
cinds = find(~cellfun(@isempty, regexp(SPM.xX.name,sprintf(' %s',xlvl{c})))); % need to add space or will also match PPI_
pinds = find(~cellfun(@isempty, regexp(SPM.xX.name,xlvlPPI{c})));
for i=1:length(cinds)
figure(s*100+c*10+i)
plot(SPM.xX.X(1:178,cinds(i)))
hold on
plot(SPM.xX.X(1:178,pinds(i)),'r')
title(['sub' subj '\color{blue}' SPM.xX.name(cinds(i)) ' - ' '\color{red}' SPM.xX.name(pinds(i))])
end
end
Thank you, Donald!!
Gina
Threaded View
| Title | Author | Date |
|---|---|---|
| Gina Joue | May 9, 2016 | |
| Donald McLaren | May 10, 2016 | |
| Gina Joue | May 10, 2016 | |
| Donald McLaren | May 11, 2016 | |
| Gina Joue | May 27, 2016 | |
| Donald McLaren | May 27, 2016 | |