FQT Using variables in text and text equations: Difference between revisions
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[https://docs.moodle.org/33/en/Formulas_question_type < Formulas question type] | |||
==Using variables in text== | ==Using variables in text== | ||
It is simple to substitute the variables in the text, you only need to enclose the corresponding variables with { }. Each text field has a scope of variables. All variables x of either number or string in the scope of the text can be used to replace the corresponding placeholder {x} in the text. | It is simple to substitute the variables in the text, you only need to enclose the corresponding variables with <span style="font-family:monospace;font-size:113%;">{ }</span>. Each text field has a scope of variables. All variables x of either number or string in the scope of the text can be used to replace the corresponding placeholder <span style="font-family:monospace;font-size:113%;">{x}</span> in the text. | ||
It is also possible to evaluate an expression directly in the text by adding an equal sign at the beginning of the bracket such as {=x/1000}. It is easier to use if the named variables are not required. However, no error check is done unless the question is being instantiated in the quiz. An example is the rescaling of meters to kilometers below: | It is also possible to evaluate an expression directly in the text by adding an equal sign at the beginning of the bracket such as <span style="font-family:monospace;font-size:113%;">{=x/1000}</span>. It is easier to use if the named variables are not required. However, no error check is done unless the question is being instantiated in the quiz. An example is the rescaling of meters to kilometers below: | ||
<pre style="font-size:113%;width: 98%;"> | |||
What is the speed of the rocket if it travels with distance {=x/1000} km in {t} s? | |||
</pre> | |||
==Using variables in text equations== | ==Using variables in text equations== | ||
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Variables can be substituted in these equations, as in the text, by enclosing them with {}. Expressions such as {=x/1000} can also be substituted in these equations. | Variables can be substituted in these equations, as in the text, by enclosing them with {}. Expressions such as {=x/1000} can also be substituted in these equations. | ||
<div style="border:1px solid #bce8f1;border-radius:4px;padding: 0px 15px 0px; margin:20px 0 25px;"> | |||
<div style="font-family:Lucida Sans Unicode;font-size:113%;color:#6c336d;margin:10px 0 10px;> Example</div> | |||
Write the following equation in the TeX, MathML ans AsciiMath syntaxes: | |||
::{a}''x''<sup>2</sup> + {b}''x'' + {c} = 0 | |||
''TeX'' | |||
<pre style="font-size:113%;width: 98%;"> | |||
\( {a} x^2 + {b} x + {c} = 0 \) | |||
</pre> | |||
''MathML'' | |||
<pre style="font-size:113%;width: 98%;"> | |||
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»{a}«/mn»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«mn»{b}«/mn»«mi»x«/mi»«mo»+«/mo»«mn»{c}«/mn»«mo»=«/mo»«mn»0«/mn»«/math» | |||
</pre> | |||
</div> | |||
[https://docs.moodle.org/33/en/Formulas_question_type < Formulas question type] | [https://docs.moodle.org/33/en/Formulas_question_type < Formulas question type] | ||
[[Category:Formulas question type]] | [[Category:Formulas question type]] | ||
Revision as of 05:15, 4 December 2017
Using variables in text
It is simple to substitute the variables in the text, you only need to enclose the corresponding variables with { }. Each text field has a scope of variables. All variables x of either number or string in the scope of the text can be used to replace the corresponding placeholder {x} in the text.
It is also possible to evaluate an expression directly in the text by adding an equal sign at the beginning of the bracket such as {=x/1000}. It is easier to use if the named variables are not required. However, no error check is done unless the question is being instantiated in the quiz. An example is the rescaling of meters to kilometers below:
What is the speed of the rocket if it travels with distance {=x/1000} km in {t} s?
Using variables in text equations
Text equations are equations that are displayed in the text using an equation syntax such as:
- TeX
- MathML
- AsciiMath
Variables can be substituted in these equations, as in the text, by enclosing them with {}. Expressions such as {=x/1000} can also be substituted in these equations.
Write the following equation in the TeX, MathML ans AsciiMath syntaxes:
- {a}x2 + {b}x + {c} = 0
TeX
\( {a} x^2 + {b} x + {c} = 0 \)
MathML
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»{a}«/mn»«msup»«mi»x«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«mn»{b}«/mn»«mi»x«/mi»«mo»+«/mo»«mn»{c}«/mn»«mo»=«/mo»«mn»0«/mn»«/math»
