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Re: Output file with string blanks and float [message #90881 is a reply to message #90880]

Mon, 04 May 2015 06:47

Matthew Argall
Messages: 286
Registered: October 2011

Senior Member

Instead of writing a space, simply advance the file pointer to the right.

Take this example

;A line of data
data = [1.0, -1.0, 6.0]

;Search for and remove negative numbers
ipos = where(data ge 0, npos, COMPLEMENT=ineg, NCOMPLEMENT=nneg)
data = data[ipos]

;Create a format code with floats for positive numbers and spaces for negative numbers
fmt = strarr(npos + nneg)
if npos gt 0 then fmt[ipos] = 'f8.2'
if nneg gt 0 then fmt[ineg] = '8x'
fmt = '(' + strjoin(fmt, ',') + ')'

;Results
help, string(data, FORMAT=fmt)
<Expression> STRING = ' 1.00 6.00'

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[Message index]

		Output file with string blanks and float By: Miguel on Sun, 03 May 2015 01:26
		Re: Output file with string blanks and float By: Miguel on Sun, 03 May 2015 02:07
		Re: Output file with string blanks and float By: David Fanning on Sun, 03 May 2015 05:35
		Re: Output file with string blanks and float By: Miguel on Sun, 03 May 2015 08:14
		Re: Output file with string blanks and float By: Matthew Argall on Sun, 03 May 2015 13:44
		Re: Output file with string blanks and float By: Miguel on Mon, 04 May 2015 02:51
		Re: Output file with string blanks and float By: Matthew Argall on Mon, 04 May 2015 06:47
		Re: Output file with string blanks and float By: Miguel on Mon, 04 May 2015 09:01

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