MATLAB Answers

Setting axes in bar function

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Exemple
x=0:1:20
y=1;.9999999;.9999998;.9999997;.9999996;.9999996;.9999995;.9999994;.9999993;.9999992;.9999991;.9999991;.9999991;.9999991;.9999991;.9999991;.9999991;.9999991;.9999991;.9999990;.9999990]
bar(x,y)
-----------------------------------------------
The variation of my function is very small, and the values are very precise (1e-10)
I want to customize the way in which tick labels appear in Matlab plot axes
  • 1/ modify the x and y axes limits (from min value to max value)
  • 2/ display 10 decimal digits in y and x axes

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Accepted Answer

Star Strider
Star Strider on 1 Jun 2014
Edited: Star Strider on 1 Jun 2014
This works:
figure(1)
bar(x,y)
axis([-0.5 20.5 min(y)-2E-8 max(y)])
xt = {get(gca, 'YTick')}
for k1 = 1:10
xts{k1} = (num2str(xt{1}(k1),'%.10f'));
end
set(gca, 'YTick', cell2mat(xt), 'YTickLabel', xts, 'FontSize',7)
producing:

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Star Strider
Star Strider on 2 Jun 2014
‘Star Strider: y0=1 not 0.999999’
Overlooked that.
Fixed now:
figure(1)
bar(x,y)
axis([-0.5 20.5 min(y)-5E-8 max(y)])
yt = {get(gca, 'YTick')}
for k1 = 1:size(yt{1},2)
xts{k1} = (num2str(yt{1}(k1),'%.10f'));
end
set(gca, 'YTick', cell2mat(yt), 'YTickLabel', xts, 'FontSize',7)

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More Answers (2)

aneps
aneps on 1 Jun 2014
Edited: aneps on 2 Jun 2014
use xlim, ylim options... you can simply give
xlim=([xmin xmax]);
ylim=([ymin ymax]);
or
set(gca,'XLim',[xmin xmax]);
set(gca,'XTick',[xmin:interval:xmax]);
set(gca,'YLim',[ymin ymax]);
set(gca,'YTick',[ymin:interval:ymax]);
for decimal places
xn=get(gca,'xtick');
set(gca,'xticklabel',sprintf('%.10f |',xn));
yn=get(gca,'ytick');
set(gca,'yticklabel',sprintf('%.10f |',yn));

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abidi Mohamed
abidi Mohamed on 1 Jun 2014
thank you aneps have you any solution for my second problem "display 10 decimal digits in y and x axes"

  3 Comments

aneps
aneps on 2 Jun 2014
see the update of my answer....
Star Strider
Star Strider on 2 Jun 2014
...posted 21 hours after mine...
abidi Mohamed
abidi Mohamed on 2 Jun 2014
aneps,Star Strider: thank you very much for your help
Star Strider: y0=1 not 0.999999

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