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Getting an error after rounding data.

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Afzal
Afzal 2013-4-21
关闭： MATLAB Answer Bot 2021-8-20
I get an error saying 'Index exceeds matrix dimensions.' when I try to plot data rounded to 3 decimal places. It works fine without rounding.
filtered_hand = sprintf('%6.3f',filtered_hand)
plot3(handles.axes4, filtered_hand(index(j),1), filtered_hand(index(j),2), filtered_hand(index(j),3), 'o')
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Afzal
Afzal 2013-4-21
编辑：Afzal 2013-4-21
I figured it out. I need to use num2str(data, precision) instead of sprintf. I actually wanted to do the following:
plot3(handles.axes4, filtered_hand(index(j),1), filtered_hand(index(j),2), filtered_hand(index(j),3), 'o')
set(handles.text1, 'String', ['The position of target ' num2str(j) ' is x = ' num2str(filtered_hand(index(j),1),3) ' m y = ' num2str(filtered_hand(index(j),2),3) ' m z = ' num2str(filtered_hand(index(j),3),3) ' m '])

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-4-21
编辑：Azzi Abdelmalek 2013-4-21
After
filtered_hand = sprintf('%6.3f',filtered_hand)
filtered_hand becomes a string
If you want to round to 3 decimals use
filtered_hand = round(filtered_hand*1000)/1000

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