POSITIONAL TABULATION
Name:
Type:
Purpose:
Generate a position tabulation for one of Dataplot's supported
univariate statistics for either a list of variables or a list
of matrices.
Description:
Dataplot typically computes statistic for the rows of a variable.
However, there may be times where it is desirable to compute a
statistic for each row of a list of variables. For example, given
the variables A, B, C, and D where each variable has 5 rows,
the POSITIONAL TABULATION MEAN will print the means for
row 1: mean of A(1), B(1), C(1), D(1)
row 2: mean of A(2), B(2), C(2), D(2)
row 3: mean of A(3), B(3), C(3), D(3)
row 4: mean of A(4), B(4), C(4), D(4)
row 5: mean of A(5), B(5), C(5), D(5)
If you specify a list of matrices, then the statistic will be
computed for each (i,j) position of the matrices.
The list can contain either variables or matrices, but not a mix.
All names in the list should have the same dimension. That is, if
it is a list of variables, then each variable should have the same
length. If it is a list of matrices, then each matrix should
have the same number of rows and the same number of columns.
Syntax:
POSITIONAL TABULATION <stat> <y1> ... <yk>
<SUBSET/EXCEPT/FOR qualification>
where <stat> is one of Dataplot's supported statistics;
<y1> ... <yk> is a list of 1 to 30 response variables or
matrices (with the same dimensions);
and where the <SUBSET/EXCEPT/FOR qualification> is optional.
This syntax generates a count of the number of elements in each row
and column combination.
Examples:
POSITIONAL TABULATION MEAN Y1 TO Y5
POSITIONAL TABULATION MEAN Y1 TO Y5 FOR I = 1 1 25
Note:
For a list of supported statistics, enter the command
HELP STATISTICS
Only statistics that operate on a single response are supported.
Note:
The output is also written to the file DPST1F.DAT. For example,
you can do something like the following
POSITIONAL TABULATION MEAN A B C D
SKIP 0
READ DPST1F.DAT ROW COL YMEAN
Note:
To specify the number of digits to print to the right of the
decimal point, enter the command (the default is exponential
format)
SET WRITE DECIMALS
Default:
Synonyms:
Related Commands:
CROSS TABULATE = Generates a cross tabulation for a specified statistic.
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MATRIX ROW = Generated row statistics for a matrix.
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STATISTIC PLOT = Generate a statistic versus subset plot.
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FLUCTUATION PLOT = Generates a fluctuation plot.
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TABULATION PLOT = Generates a tabulation plot.
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Applications:
Exploratory Data Analysis
Implementation Date:
Program 1:
let y1 = data 1 2 3
let y2 = data 4 5 6
let y3 = data 7 8 9
.
set write decimals 3
positional tabulation mean y1 y2 y3
.
read dpst1f.dat row col ymean
Program 2:
read matrix a
1 2 3
4 5 6
7 8 9
end of data
.
read matrix b
11 21 31
41 51 61
71 81 91
end of data
.
read matrix c
101 102 103
111 121 131
141 151 161
end of data
.
SET WRITE DECIMALS 1
POSITIONAL TABULATION SUM A B C
Date created: 09/22/2011
Last updated: 09/22/2011
Please email comments on this WWW page to
alan.heckert@nist.gov.
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