Help using grpstats function to get number of occurances per row on a table.
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I have the following table (4 rows, column names are simply "Col1", "Col2" and so on), for which I'd like to apply grpstats function on.
'China','Hong Kong', '', 'China'
'', 'Switzerland', '', 'Switzerland'
'United States', 'Ireland', '', 'United States'
'Finland', 'Finland', 'Sweden', ''
What I would like to do is to get is the most repeated observation across the rows, using such function without needing to use a combination of accumaray, categorical and unique.
How may I use it? Can you help please?
3 Comments
To be clear, you want to return the most repeated value in this 4x4 array, is that correct? If so, no need to use grpstats.
4×4 cell array
{'China' } {'Hong Kong' } {0×0 char} {'China' }
{0×0 char } {'Switzerland'} {0×0 char} {'Switzerland' }
{'United States'} {'Ireland' } {0×0 char} {'United States'}
{'Finland' } {'Finland' } {'Sweden'} {0×0 char }
Ajpaezm
on 28 Apr 2021
Adam Danz
on 29 Apr 2021
My answer uses groupcounts which does not rely on having the stats & machine learning toolbox, unlike grpstats.
Answers (1)
C = {'China','Hong Kong', '', 'China'
'', 'Switzerland', '', 'Switzerland'
'United States', 'Ireland', '', 'United States'
'Finland', 'Finland', 'Sweden', ''};
rowNum = repmat((1:size(C,1))', 1, size(C,2));
T = table(C(:),rowNum(:),'VariableNames',{'Country','RowNum'});
B = groupcounts(T,{'RowNum','Country'})
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