Clarify loss per league feature

[ypp-sc-tools.db-test.git] / yarrg / web / docs

diff --git a/yarrg/web/docs b/yarrg/web/docs
index 24d9f165817fe95de8333067fb1027ac35d9bbfa..564aadc72e7735fd23ecfcee705dcf23b73ee0dd 100755 (executable)
--- a/yarrg/web/docs
+++ b/yarrg/web/docs
@@ -114,23 +114,30 @@ So you should specify your vessel capacity.  You can enter things
 like:
 <dl>
 <dt>sloop
 like:
 <dl>
 <dt>sloop

-<dd>The capacity of a sloop, exactly
+<dd>The capacity of a sloop, leaving no allowance for rum and shot
+<dt>wb - 1%
+<dd>The capacity of a war brig minus 1%

 <dt>20t 13kl
 <dt>20t 13kl

-<dd>20 tonnes (20,000kg), 13 kilolitres (13,000l)
+<dd>13 tonnes (13,000kg), 20 kilolitres (20,000l)

 <dt>sloop - 100l 100kg
 <dd>The capacity of a sloop minus 100l, minus 100kg
 <dt>2t plus 500kg minus 200kg
 <dd>2300kg, with no limit on volume
 </dl>
 <dt>sloop - 100l 100kg
 <dd>The capacity of a sloop minus 100l, minus 100kg
 <dt>2t plus 500kg minus 200kg
 <dd>2300kg, with no limit on volume
 </dl>

+Evaluation is strictly from left to right.
+
+<p>

 
 Formally, the capacity is a list of terms, all but the first preceded
 by one of <kbd>-</kbd>, <kbd>minus</kbd>, <kbd>+</kbd>,
 <kbd>plus</kbd>.  Each term may specify a mass and/or a volume
 (separated by a space), as a number followed (without an intervening
 space) by a unit (<kbd>t</kbd>, <kbd>kg</kbd>, <kbd>kl</kbd> or
 
 Formally, the capacity is a list of terms, all but the first preceded
 by one of <kbd>-</kbd>, <kbd>minus</kbd>, <kbd>+</kbd>,
 <kbd>plus</kbd>.  Each term may specify a mass and/or a volume
 (separated by a space), as a number followed (without an intervening
 space) by a unit (<kbd>t</kbd>, <kbd>kg</kbd>, <kbd>kl</kbd> or

-<kbd>l</kbd>).  The first term may be a ship name or abbrevation
-instead.  If the first term specifies only one of mass or volume, all
-the subsequent terms may only adjust that same value.
+<kbd>l</kbd>).  Alternatively each term except the first may specify a
+percentage, which is applied as a percentage change to the answer from
+all the preceding terms.  The first term may be a ship name or
+abbrevation instead.  If the first term specifies only one of mass or
+volume, all the subsequent terms may only adjust that same value.

 
 <h3>Expected losses</h3>
 
 
 <h3>Expected losses</h3>
 


@@ -150,14 +157,15 @@ to do.
 
 <p>
 
 
 <p>
 

-Trades whose margin is less than the expected loss are never selected.
-For example, if you select 1% loss per league, and plan a voyage of 5
-leagues, then any trade with a margin of less than 5.15% would be
-completely excluded (5.15% not 5% because the loss works like compound
-interest).  Theoretically very profitable trades which are close to
-the expected break-even point because of the distance can also be
-rejected by the optimiser in favour of shorter distance trades with
-theoretically smaller margins.
+Trades whose margin is less than the expected loss are never included
+in the suggested plan.  For example, if you select 1% loss per league,
+and plan a voyage of 5 leagues, then any trade with a margin of less
+than 5.15% would be completely excluded (5.15% not 5% because the loss
+works like compound interest).  Theoretically very profitable trades
+which are close to the expected break-even point because of the
+distance can also be rejected by the optimiser in favour of shorter
+distance trades with theoretically smaller margins, if it's not
+possible to do both.

 
 <p>
 
 
 <p>