Numerical integration/Gauss-Legendre Quadrature: Difference between revisions

Numerical integration/Gauss-Legendre Quadrature (view source)

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→‎version 2: used more idiomatic code for computing the number of decimal digits of pi.

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Revision as of 19:40, 21 December 2020 (view source) rosettacode>Gerard Schildberger m (→‎version 3, more precision: changed wording in the REXX section header.) ← Older edit		Revision as of 19:41, 21 December 2020 (view source) rosettacode>Gerard Schildberger m (→‎version 2: used more idiomatic code for computing the number of decimal digits of pi.) Newer edit →
Line 2,312: <br>visual indication of what's what,   but it's the dickens to pay when updating the source code. <lang rexx>/REXX program does numerical integration using an N─point Gauss─Legendre quadrature rule. / pi= pi(); digs= length(pi) -1 length(.); numeric digits digs; reps= digs % 2 !.= .; b= 3; a= -b; bma= b - a; bmaH= bma / 2; tiny= '1e-'digs trueV= exp(b)-exp(a); bpa= b + a; bpaH= bpa / 2