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51150-quickfields-analysis.rmd
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51150-quickfields-analysis.rmd
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# Quickfields: analysis{#xquickfields-analysis}
## Summary
We already saw that [Quickfields](#xquickfields) are a special kind of [hashtag](#xhashtags) for factors and links. They are a *refinement* of hashtags for when you have a set of categories which is mutually exclusive.
You can add information about one or more dimensions using a format like this:
<u>Crops improved / time:before</u>
<u>Crops improved / time:after</u>
You can search for and display this information across all your tables and maps, not separately as they would be if you used ordinary hashtags like #before and #after, but together.
This feature is automatic and does not need to be switched on with any filter.
Quickfields can be hidden in labels using the `hide_quickfields` filter. This can provide a kind of zoom.
## Uses
- to search, filter, and organise the factors, links and mentions tables 
- e.g. to summarise all the factors marked as `before` 
- to filter the map to show only factors marked as `before` . 
- to filter the map to exclude factors marked as `after`.
- to colour factor backgrounds, borders and/or text, or to scale the factors, according to the value of the quick field `time`.
If you set numerical values e.g. `time:0`, `time:1`, `time:2` then the quick field `time` will be treated as numerical and so in particular continuous formatting for colours will be used e.g. a fade from red to blue.
## Quickfields are also ordinary hashtags
Quick field hashtags are still hashtags, so you can still *also* do all the things you would do with hashtags, for example search for "time:after" as a complete hashtag just as you would if it did not contain an `:` sign.
`find factors label contains time:after`
is equivalent to
`find factors time=after
## Hiding quickfields{#xhiding-quickfields}
Quickfields can be hidden in labels using the `hide quickfields` filter,
to go from this:
{width=650}
to this:
{width=650}
Slashes and spaces and any leading semicolon will be removed.
## Current limitation
When you use filters which merge factors together (zooming and bundling factors) the values of quickfields for *any factors which are lost because they are nested into the higher levels* are not available.
## 🧪Quickfields for links
Quickfields are now available for links too.