Number conversion and rectangle around text

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Sepp
Sepp 2014-6-18
评论： Image Analyst 2014-6-19
Hi
I'm currently using bar plots and I have two small questions hoping somebody can help.
1. I have the following in my code
text(x(j)-0.15, y(j)+0.07+spacing, num2str(y_old(j)), 'VerticalAlignment', 'top', 'FontSize', 16, 'fontname', 'times', 'BackgroundColor', [1 1 1])
Around this text there is a rectangle (which is white in my case). How can I remove the space between the text and the rectangle so that there is no "boundary" around the text?
2. I'm using in my bar plots two different types of numbers: e.g. 0.000523523 and 1.2345
The first one I want to print in the bar plot (e.g. on the axis) as 5.234E-04 and the second one as 1.245. So all numbers should be rounded to 3 decimal places and if neccesary a E- attached.
I want this for the axis of my bar plot as well as for conversion with num2str.
How can I do that?

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Image Analyst
Image Analyst 2014-6-19
Look up tick marks in the help or in Answers to see how you can modify the numerical labels on the x-axis to be exactly what you want.
  2 个评论
Sepp
Sepp 2014-6-19
Thank you. The problem with the axis labels is solved.
What remains is the problem with the rectangle around the text. Does somebody know how I can remove the space between the text and the rectangle in the text object?
Image Analyst
Image Analyst 2014-6-19
Adjust the first two arguments of the text() command to get the position you want.
Please mark as "Accepted" if we're done here.

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