HeaderAlignment
is an option for Dataset that specifies how the contents of a header should be aligned within the available area in the header.
Details
- The following settings can be given:
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Automatic default alignment based on environment Left left aligned Right right aligned Top top aligned Bottom bottom aligned Baseline baseline aligned Center centered {h,v} separate horizontal and vertical alignments - The settings for HeaderAlignment can be given as follows to apply separately to different items:
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spec apply spec to all headers {spec1,spec2,…,specn} apply speck to headers at dataset level k 
also allow explicit rules for individual headers - The speck can have the following forms:
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{s1,s2,…,sn} use s1 through sn; then use defaults {{c}} use c in all cases {{c1,c2}} alternate between c1 and c2 {{c1,c2,…}} cycle through all ci {s,{c}} use s, then repeatedly use c {s1,{c},sn} use s1, then repeatedly use c, but use sn at the end {s1,s2,…,{c1,c2,…},sm,…,sn} use the first sequence of si at the beginning, then cyclically use the ci, then use the last sequence of si at the end {s1,s2,…,{},sm,…,sn} use the first sequence of si at the beginning and the last sequence at the end - Rules have the form ispec, where i specifies a position in the dataset.
- Positions can be patterns.
- The position of a header can be read at the bottom of a dataset when you hover over the header.
- If the left-hand side of a rule is not a list, the setting is applied to any position that contains the left-hand side as a key or index.
- A pure function f that returns an alignment can be used in place of any alignment. The setting is given by f[item,position,data], where data is the dataset's first argument.
Examples
open all close allPossible Issues (1)
If the value of HeaderAlignment is a list and a valid alignment specification, it is interpreted as a single alignment that is applied to all headers. If it is not a valid alignment specification, it is interpreted as a list of alignment values that are applied to successive dataset levels.
Right-align and vertically center all row headers:
Center row headers and right-align column headers:
To force interpretation of a list as alignments that are applied one per level, use full alignment specifications in the list positions:
Text
Wolfram Research (2020), HeaderAlignment, Wolfram Language function, https://reference.wolfram.com/language/ref/HeaderAlignment.html.
CMS
Wolfram Language. 2020. "HeaderAlignment." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/HeaderAlignment.html.
APA
Wolfram Language. (2020). HeaderAlignment. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/HeaderAlignment.html