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ministat(1) [freebsd man page]

MINISTAT(1)						    BSD General Commands Manual 					       MINISTAT(1)

NAME

     ministat -- statistics utility

SYNOPSIS

     ministat [-Ans] [-C column] [-c confidence_level] [-d delimiter] [-w [width]] [file ...]

DESCRIPTION

     The ministat command calculates fundamental statistical properties of numeric data in the specified files or, if no file is specified, stan-
     dard input.

     The options are as follows:

     -A 	 Just report the statistics of the input and relative comparisons, suppress the ASCII-art plot.

     -n 	 Just report the raw statistics of the input, suppress the ASCII-art plot and the relative comparisons.

     -s 	 Print the average/median/stddev bars on separate lines in the ASCII-art plot, to avoid overlap.

     -C column	 Specify which column of data to use.  By default the first column in the input file(s) are used.

     -c confidence_level
		 Specify desired confidence level for Student's T analysis.  Possible values are 80, 90, 95, 98, 99 and 99.5 %

     -d delimiter
		 Specifies the column delimiter characters, default is SPACE and TAB.  See strtok(3) for details.

     -w width	 Width of ASCII-art plot in characters, default is 74.

     A sample output could look like this:

	     $ ministat -s -w 60 iguana chameleon
	     x iguana
	     + chameleon
	     +------------------------------------------------------------+
	     |x      *	x	     *	    +		   + x		 +|
	     | |________M______A_______________|			  |
	     |		   |________________M__A___________________|	  |
	     +------------------------------------------------------------+
		 N	  Min	     Max     Median	   Avg	     Stddev
	     x	 7	   50	     750	200	   300	  238.04761
	     +	 5	  150	     930	500	   540	  299.08193
	     No difference proven at 95.0% confidence

     If ministat tells you, as in the example above, that there is no difference proven at 95% confidence, the two data sets you gave it are for
     all statistical purposes identical.

     You have the option of lowering your standards by specifying a lower confidence level:

	     $ ministat -s -w 60 -c 80 iguana chameleon
	     x iguana
	     + chameleon
	     +------------------------------------------------------------+
	     |x      *	x	     *	    +		   + x		 +|
	     | |________M______A_______________|			  |
	     |		   |________________M__A___________________|	  |
	     +------------------------------------------------------------+
		 N	  Min	     Max     Median	   Avg	     Stddev
	     x	 7	   50	     750	200	   300	  238.04761
	     +	 5	  150	     930	500	   540	  299.08193
	     Difference at 80.0% confidence
		   240 +/- 212.215
		   80% +/- 70.7384%
		   (Student's t, pooled s = 264.159)

     But a lower standard does not make your data any better, and the example is only included here to show the format of the output when a sta-
     tistical difference is proven according to Student's T method.

SEE ALSO

     Any mathematics text on basic statistics, for instances Larry Gonicks excellent "Cartoon Guide to Statistics" which supplied the above exam-
     ple.

HISTORY

     The ministat command was written by Poul-Henning Kamp out of frustration over all the bogus benchmark claims made by people with no under-
     standing of the importance of uncertainty and statistics.

     From FreeBSD 5.2 it has lived in the source tree as a developer tool, graduating to the installed system from FreeBSD 8.0.

BSD
								 November 10, 2012							       BSD

Check Out this Related Man Page

PSC(1)							      General Commands Manual							    PSC(1)

NAME

       psc - prepare sc files

SYNOPSIS

       psc [-fLkrSPv] [-s cell] [-R n] [-C n] [-n n] [-d c]

DESCRIPTION

       Psc  is used to prepare data for input to the spreadsheet calculator sc(1).  It accepts normal ascii data on standard input.  Standard out-
       put is a sc file.  With no options, psc starts the spreadsheet in cell A0.  Strings are right justified.  All data on a line is entered	on
       the  same row; new input lines cause the output row number to increment by one.	The default delimiters are tab and space.  The column for-
       mats are set to one larger than the number of columns required to hold the largest value in the column.

OPTIONS

       -f     Omit column width calculations.  This option is for preparing data to be merged with an existing spreadsheet.  If the option is  not
	      specified, the column widths calculated for the data read by psc will override those already set in the existing spreadsheet.

       -L     Left justify strings.

       -k     Keep  all  delimiters.   This  option  causes the output cell to change on each new delimiter encountered in the input stream.   The
	      default action is to condense multiple delimiters to one, so that the cell only changes once per input data item.

       -r     Output the data by row first then column.  For input consisting of a single column, this option will result in  output  of  one  row
	      with multiple columns instead of a single column spreadsheet.

       -s cell
	      Start  the  top  left  corner  of the spreadsheet in cell.  For example, -s B33 will arrange the output data so that the spreadsheet
	      starts in column B, row 33.

       -R n   Increment by n on each new output row.

       -C n   Increment by n on each new output column.

       -n n   Output n rows before advancing to the next column.  This option is used when the input is  arranged  in  a  single  column  and  the
	      spreadsheet is to have multiple columns, each of which is to be length n.

       -d c   Use the single character c as the delimiter between input fields.

       -P     Plain numbers only.  A field is a number only when there is no imbedded [-+eE].

       -S     All numbers are strings.

       -v     Print the version of psc

SEE ALSO

       sc(1)

AUTHOR

       Robert Bond

PSC 7.16							 19 September 2002							    PSC(1)
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