how do i extract 3 separate groups from one column
显示 更早的评论
How do i extract 3 groups from one coloumn in association to their mean e.g:
group mean
1 24
1 34
2 60
2 12
3 14
3 12
How do i extract the data from each group separately and plot
采纳的回答
Try this:
groupMean = [...
1 24
1 34
2 60
2 12
3 14
3 12];
uniqueGroups = unique(groupMean(:, 1))
for g = 1 : length(uniqueGroups)
thisGroup = uniqueGroups(g);
thisGroupsRows = groupMean(:, 1) == thisGroup;
theseMeans = groupMean(thisGroupsRows, 2); % Get value in column 2
% bar(theseMeans);
plot(theseMeans, '.-', 'LineWidth', 2, 'MarkerSize', 40)
hold on;
legendStrings{g} = sprintf('Group %d', thisGroup);
end
grid on;
legend(legendStrings)
6 个评论
Savannah Britto
2022-4-15
Image Analyst
2022-4-15
Show your code, because as you can see I literally ran it in the text box above and it ran fine. Maybe you don't have a matrix. Maybe you have a table - I don't know because you forgot to attach the actual data. So I don't know the exact type of variable(s) they are. Attach your matrix if you still have trouble.
Savannah Britto
2022-4-15
编辑：Savannah Britto
2022-4-16
Image Analyst
2022-4-16
@Savannah Britto I'm not sure how you adapted my code since you forgot to attach it. However it seems to work fine for me with no error:
% subj group trial logmIKI
data = readmatrix('advancedstats2.csv');
groupNumbers = data(:, 2);
logmIKI = data(:, 4);
uniqueGroups = unique(groupNumbers)
for g = 1 : length(uniqueGroups)
% Get the group we'll use on this iteration.
thisGroup = uniqueGroups(g);
% Find out what rows this group number appears in.
thisGroupsRows = groupNumbers == thisGroup;
% Get logmIKI value.
theseMeans = logmIKI(thisGroupsRows);
% bar(theseMeans);
plot(theseMeans, '-', 'LineWidth', 2)
hold on;
legendStrings{g} = sprintf('Group %d', thisGroup);
end
grid on;
legend(legendStrings)
Of course each group has different number of elements, and since I'm plotting the x value as just the index, the plots have different widths in the x direction.
Savannah Britto
2022-4-16
Image Analyst
2022-4-16
You didn't click "Accept this answer" so I'm wondering what's left undone? Did my code not do what you expected?
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