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MTM

 expint
 compute the exponential integral

 Calling Sequence expint(M) expint(x)

Parameters

 M - array x - expression

Description

 • The expint(x) function computes the exponential integral of x.
 • The expint(M) function computes the element-wise exponential integral of M.  The result, R, is formed as R[i,j] = expint(M[i,j]).

Examples

 > $\mathrm{with}\left(\mathrm{MTM}\right):$
 > $M≔⟨⟨7.117324,7.792180⟩|⟨-6.816817,5.407879⟩|⟨3.484225,-7.384283⟩|⟨5.010275,2.681853⟩⟩$
 ${M}{≔}\left[\begin{array}{cccc}{7.117324}& {-6.816817}& {3.484225}& {5.010275}\\ {7.792180}& {5.407879}& {-7.384283}& {2.681853}\end{array}\right]$ (1)
 > $\mathrm{expint}\left(M\right)$
 $\left[\begin{array}{cccc}{0.0001011777767}& {-164.9435469}{-}{3.141592654}{}{I}& {0.007107633866}& {0.001134534114}\\ {0.00004748425685}& {0.0007132450949}& {-262.8444112}{-}{3.141592654}{}{I}& {0.01963923428}\end{array}\right]$ (2)