LON-CAPA Help

This is a list of functions that have been written that are available in the Safe space scripting environment inside a problem:

• sin(x), cos(x), tan(x)

• asin(x), acos(x), atan(x), atan2(y,x)

• log(x), log10(x)

• exp(), pow(x,y), sqrt(x)

• abs(x), sgn(x)

• erf(x), erfc(x)

• ceil(x), floor(x)

• min(...), max(...)

• factorial(n)

• N%M (modulo function)

• sinh(x), cosh(x), tanh(x)

• asinh(x), acosh(x), atanh(x)

• roundto(x,n)

• cas(s,e,l)

• web("a","b","c") or web(a,b,c)

• html("a") or html(a)

• j0(x), j1(x), jn(n,x), jv(y,x)

• y0(x), y1(x), yn(n,x), yv(y,x)

• random

• choose

• tex("a","b") or tex(a,b)

• var_in_tex(a)

• to_string(x), to_string(x,y)

• class(), sec(), classid()

• name(), firstname(), middlename(), lastname(), student_number()

• check_status(partid)

• open_date(partid), due_date(partid), answer_date(partid)

• open_date_epoch(partid), due_date_epoch(partid), answer_date_epoch(partid)

• submission(partid,responseid,version)

• currentpart()

• sub_string()

• array_moments(array)

• format(x,y),prettyprint(x,y,target),dollarformat(x,target)

• languages

• map(...)

• caparesponse_check

• caparesponse_check_list

• parameter_setting(name,partid)

• EXT()

• stored_data(name,partid)

• wrong_bubbles(correct,lower,upper,step,@given)

We also support these functions from Math::Cephes

 bdtr:  Binomial distribution
 bdtrc:  Complemented binomial distribution
 bdtri:  Inverse binomial distribution
 btdtr:  Beta distribution
 chdtr:  Chi-square distribution
 chdtrc:  Complemented Chi-square distribution
 chdtri:  Inverse of complemented Chi-square distribution
 fdtr:  F distribution
 fdtrc:  Complemented F distribution
 fdtri:  Inverse of complemented F distribution
 gdtr:  Gamma distribution function
 gdtrc:  Complemented gamma distribution function
 nbdtr:  Negative binomial distribution
 nbdtrc:  Complemented negative binomial distribution
 nbdtri:  Functional inverse of negative binomial distribution
 ndtr:  Normal distribution function
 ndtri:  Inverse of Normal distribution function
 pdtr:  Poisson distribution
 pdtrc:  Complemented poisson distribution
 pdtri:  Inverse Poisson distribution
 stdtr:  Student's t distribution
 stdtri:  Functional inverse of Student's t distribution

See https://metacpan.org/pod/Math::Cephes for more information

Support for complex numbers in the Safe space scripting environment is available via the LONCAPA::LCMathComplex package, which is the standard Math::Complex module available from CPAN, modified to work in Safe space.

These functions from LONCAPA::LCMathComplex are available:

Re($z)
Im($z)
arg($z)
abs($z)

where $z is a complex number created using the Cartesian form, where $a and $b are numbers in one of the following ways:

$z = LONCAPA::LCMathComplex->make($a, $b);
$z = cplx($a, $b);
$z = $a + $b*i;

or created using the polar form, where $m and $n are numbers, in which the first argument is the modulus, and the second is the angle in radians:

$z = LONCAPA::LCMathComplex->emake($m, pi/$n);
$z = cplxe($m, pi/$n);

Where there is no overlap with function names used for Math::Cephes functions, then you can just use the LCMathComplex functions directly, e.g.. &cplx(), &Re(), &Im(), but where there is overlap, as is the case for tanh(), to ensure the function from LCMathComplex is called, include the full namespace identifier, e.g., LONCAPA::LCMathComplex::tanh().

See: https://metacpan.org/pod/Math::Complex for more information.