How can I change bar graph x-axis?

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MByk
MByk el 11 de Ag. de 2021
Comentada: dpb el 12 de Ag. de 2021
Hello, I want to order my bar graph (left hand side) in descending order but didn't succeed in ordering x-axis labels (right hand side). Values in x-axis are feature indices. How can I fix it? Thanks for the help.
[a,b] = sort(Scores_Avg,2,'descend')
bar(Scores_Avg(b))
text(1:length(a), a', num2str(a','%0.3f'),...
'HorizontalAlignment','center','VerticalAlignment','bottom');
set(gca,'XTick',b);

Respuesta aceptada

dpb
dpb el 11 de Ag. de 2021
Editada: dpb el 11 de Ag. de 2021
[a,ia] = sort(Scores_Avg,2,'descend'); % use more meaningful index variable
bar(a) % plot the sorted array vs linear order
xticks(1:numel(a)) % set the tick marks to match bar number
xticklabels(ia) % label x ticks to go with sorted order
...
You need to first also set xticks to the full number of bins if there are enough bars that the default tick marks don't put that many tick marks on the axes.
NB: the caveat in the comment below -- as N grows, space starts to get very dear...
  6 comentarios
MByk
MByk el 12 de Ag. de 2021
Thanks.
dpb
dpb el 12 de Ag. de 2021
No problem; realized later shoulda' just done it that way originally because you can't count on the default ticks. Bad implementation choice internally, but just one of the many warts in bar().

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Más respuestas (1)

Henry Barth
Henry Barth el 11 de Ag. de 2021
set(gca,'XtickLabels',arrayfun(@num2str,b,'UniformOutput',false));
  3 comentarios
Henry Barth
Henry Barth el 11 de Ag. de 2021
what exactly is not working?
MByk
MByk el 12 de Ag. de 2021
Henry thanks for the help much appreciated.

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