evalin - Evaluate MuPAD expressions

Syntax

Description

result = evalin(symengine,'MuPAD_expression') evaluates the MuPAD expression MuPAD_expression, and returns result as a symbolic object.

[result,status] = evalin(symengine,'MuPAD_expression') returns the error status in status and the error message in result if status is nonzero. If status is 0, result is a symbolic object; otherwise, it is a string.

Examples

Compute the discriminant of the following polynomial:

evalin(symengine,'polylib::discrim(a*x^2+b*x+c,x)')

The result is:

ans =
 b^2 - 4*a*c

Do not use evalin to access the MuPAD log function that represents the logarithm to an arbitrary base. The evalin command evaluates log as the natural logarithm (the appropriate MuPAD function is ln):

evalin(symengine,'log(E)')

ans =
1

Evaluating log with two parameters results in the following error:

evalin(symengine,'log(10, 10)')

Error using mupadengine.mupadengine>mupadengine.evalin
MuPAD error: Error: expecting one argument [ln]

See Also

doc | feval | read | symengine

How To

• Calling Built-In MuPAD Functions from the MATLAB Command Window

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