--- loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2017/09/24 01:52:57	1.33
+++ loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2018/09/12 22:00:19	1.35
@@ -50,6 +50,10 @@ erf = 2/sqrt(pi) integral (0,x) et-sq an
 
 \$expr=\&math_calculus_expression() & Creates Math::Calculus::Expression object.  Methods are: \$expr->addVariable('x'), \$expr->setExpression('f(x)'), \$expr->simplify, \$expr->getExpression -- see Math::Calculus::Expression documentation at cpan.org for details.\\
 \hline
+
+(\$a,\$u)=\&conv_eng_format(\$x,\$b) & Converts numerical value \$x and base unit \$b to answer \$a and corresponding unit \$u in engineering format, i.e.,
+the answer is scaled by powers of ten, and an appropriate prefix from: m u n p f a z y k M G T P E Z Y precedes the base unit. Called in a script block to generate variables to assign to answer and unit attributes of numericalresponse tag. \\
+\hline
  
 \&prettyprint(\$x,'nn','optional target') & Note that that tag $<$num$>$ can be used to do the same thing. Display or format \$x as nn where nn is nF or nE or nS and n is an integer. Also supports the first character being a \$, it then will format the result with a a call to \&dollarformat() described below. If the first character is a , it will format it with commas grouping the thousands. In S mode it will fromat the number to the specified number of significant figures and display it in F mode. In E mode it will attempt to generate a pretty x10\^{}3 rather than a E3 following the number, the 'optional target' argument is optional but can be used to force \&prettyprint to generate either 'tex' output, or 'web' output, most people do not need to specify this argument and can leave it blank.\\
 \hline
@@ -136,7 +140,7 @@ Option 1 - \&map(\$seed,[$\backslash$\$w
  
 \&name(), \&student\_number(), \&firstname(), \&middlename(), \&lastname()  & Return the full name in the following format: lastname, firstname initial. Student\_number returns the student 9-alphanumeric string. The functions firstname, middlename, and lastname return just that part of the name. If undefined, the functions return null. \\
 \hline
-\&check\_status(\$partid) &Returns a number identifying the current status of a part. True values mean that a part is ``done'' (either unanswerable because of tries exhaustion, or correct) or a false value if a part can still be attempted. If \$part is unspecified, it will check either the current $<$part$>$'s status or if outside of a $<$part$>$, check the status of previous $<$part$>$. The full set of return codes are: 'undef' means it is unattempted, 0 means it is attempted and wrong but still has tries, 1 means it is marked correct, 2 means they have exceeded maximum number of tries, 3 means it is after the answer date.\\
+\&check\_status(\$partid) &Returns a number identifying the current status of a part. True values mean that a part is ``done'': either unanswerable because of tries exhaustion, or fully correct, or only partially correct (and retries not permitted). A false value means that a part can still be attempted. If \$part is unspecified, it will check either the current $<$part$>$'s status or if outside of a $<$part$>$, check the status of previous $<$part$>$. The full set of return codes are: 'undef' means it is unattempted, 0 means it is attempted but still has tries, and is either wrong (or partially correct, retries allowed), 1 means it is fully correct or partially correct (no retries), 2 means they have exceeded maximum number of tries, 3 means it is after the answer date.\\
 \hline
 \&open\_date(\$partid), \&due\_date(\$partid), \&answer\_date(\$partid)  & Problem open date, due date and answer date in local human-readable format.  Part 0 is chosen if \$partid is omitted.\\
 \hline