| Re: How to plot multiple charts and ho to round float to specific precision? [message #44966 is a reply to message #44858] |
Thu, 28 July 2005 09:30   |
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Paul Van Delst[1]
Messages: 1157
Registered: April 2002
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Senior Member |
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liko2@o2.pl wrote:
> No, it has to be a value of variable, later used for a part of title of
> a chart. So it has to be exact value with only 2 digits after zero.
>
Given your floating point variable,
IDL> x=23.45654
IDL> print, x
23.4565
you can stick it into a string variable
IDL> cx=string(x,format='(f15.2)')
IDL> help, cx
CX STRING = ' 23.46'
Note I used the format f15.2 since you might have a number like
IDL> y=7140264.38264
IDL> cy=string(y,format='(f15.2)')
IDL> help, cy
CY STRING = ' 7140264.38'
You'll want to leave enough room up front (via the "15" in f15.2) for the extra digits.
And then you can crop the above results to your heart's content:
IDL> help, strtrim(cx,2), strtrim(cy,2)
<Expression> STRING = '23.46'
<Expression> STRING = '140264.38'
for your plot titles.
paulv
--
Paul van Delst
CIMSS @ NOAA/NCEP/EMC
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