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< p > This module provides functions for comparing query periods.< / p > < p > It allows you to compare a given period with a previous period or with the
same period from the previous year. For example, you can compare this month's
main graph with last month or with the same month from last year.< / p >
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Summary
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< a href = "#t:mode/0" translate = "no" > mode()< / a >
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< a href = "#compare/4" translate = "no" > compare(site, source_query, mode, opts \\ [])< / a >
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< div class = "summary-synopsis" > < p > Generates a comparison query based on the source query and comparison mode.< / p > < / div >
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< pre translate = "no" > < span class = "attribute" > @type< / span > mode() :: < a href = "https://hexdocs.pm/elixir/String.html#t:t/0" > String.t< / a > () | nil< / pre >
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Functions
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< h1 class = "signature" translate = "no" > compare(site, source_query, mode, opts \\ [])< / h1 >
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< pre translate = "no" > < span class = "attribute" > @spec< / span > compare(< a href = "Plausible.Site.html#t:t/0" > Plausible.Site.t< / a > (), < a href = "Plausible.Stats.Query.html#t:t/0" > Plausible.Stats.Query.t< / a > (), < a href = "#t:mode/0" > mode< / a > (), [option()]) ::
{:ok, < a href = "Plausible.Stats.Query.html#t:t/0" > Plausible.Stats.Query.t< / a > ()}
| {:error, :not_supported}
| {:error, :invalid_dates}< / pre >
< / div >
< p > Generates a comparison query based on the source query and comparison mode.< / p > < p > The mode parameter specifies the type of comparison and can be one of the
following:< / p > < ul > < li > < p > < code class = "inline" > " previous_period" < / code > - shifts back the query by the same number of days the
source query has.< / p > < / li > < li > < p > < code class = "inline" > " year_over_year" < / code > - shifts back the query by 1 year.< / p > < / li > < li > < p > < code class = "inline" > " custom" < / code > - compares the query using a custom date range. See options for
more details.< / p > < / li > < / ul > < p > The comparison query returned by the function has its end date restricted to
the current day. This can be overriden by the < code class = "inline" > now< / code > option, described below.< / p > < h2 id = "compare/4-options" class = "section-heading" >
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Options
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< / a >
< / h2 >
< ul > < li > < p > < code class = "inline" > :now< / code > - a < a href = "https://hexdocs.pm/elixir/NaiveDateTime.html" > < code class = "inline" > NaiveDateTime< / code > < / a > struct with the current date and time. This is
optional and used for testing purposes.< / p > < / li > < li > < p > < code class = "inline" > :from< / code > - a ISO-8601 date string used when mode is < code class = "inline" > " custom" < / code > .< / p > < / li > < li > < p > < code class = "inline" > :to< / code > - a ISO-8601 date string used when mode is < code class = "inline" > " custom" < / code > . Must be
after < code class = "inline" > from< / code > .< / p > < / li > < li > < p > < code class = "inline" > :match_day_of_week?< / code > - determines whether the comparison query should be
adjusted to match the day of the week of the source query. When this option
is set to true, the comparison query is shifted to start on the same day of
the week as the source query, rather than on the exact same date. For
example, if the source query starts on Sunday, January 1st, 2023 and the
< code class = "inline" > year_over_year< / code > comparison query is configured to < code class = "inline" > match_day_of_week?< / code > ,
it will be shifted to start on Sunday, January 2nd, 2022 instead of
January 1st. Defaults to false.< / p > < / li > < / ul >
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