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| dist prefab for creating distribution histograms |
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dist computes and displays a frequency distribution (histogram) on one data field.
The data file does not need to be ordered in any particular way.
The field may contain continuous numeric data, or alphanumeric values.
Continuous numeric data is the default, but
the cats option may be used to produce category distributions
(each unique value having a bar).
With continuous numeric data, "bins" will be set up and values will
be placed into these bins (any alpha values will be lumped into one
"alpha" category).
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View the dist prefab examples
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A user-contributed prefab called multidist
is also available; it can do multiple, overlaid frequency distributions.
Hint: if no bars are appearing, try specifying bar size, eg.
barwidth=0.1. This glitch is due to the fact that
default bar widths are related to data space.
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Parameters
Prefab
parameter
name | Data type |
Default | Description |
Examples
(ignore line wrapping) |
| Standard parameters |
|
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Most of the standard prefab parameters may be used.
You must specify data (the name of the input data file).
The legend parameters and ptselect aren't available with this prefab.
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| x |
data field |
must be specified |
Identifies the data field to be used when computing the distribution. Old name: fld |
x=2
x=pmb |
| binsize |
numeric |
based on data |
The size of one "bin" for numeric distributions. |
binsize=2.5 |
| cats |
yes or no |
no |
If yes, a category distribution, using alphanumeric data, will be done. |
cats=yes |
| curve |
yes
or
linedetails |
|
If specified, a bspline curve will be fit to the histogram and displayed. |
curve=yes |
| color |
color |
pink |
Color of the histogram bars. |
color=orange |
| barwidth |
inches or cm |
based on data |
The width of the bars. |
barwidth=0.06 |
| savetbl |
yes | no |
|
If yes, a the computed frequency distribution will be dumped to the diagnostic stream
(usually standard error). |
savetbl=yes |
| order |
natural
or
mag
or
rev |
natural |
Controls the order in which bars are drawn from left to right, with cats.
natural shows them in alphabetical order,
mag based on magnitude from low to high, and rev shows them from high to low. |
order=mag |
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