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iFit/trapz

PURPOSE ^

s = trapz(a,dim) : computes the integral of iData objects elements along given dimension

SYNOPSIS ^

function [s,sigma] = trapz(a,dim, varargin)

DESCRIPTION ^

 s = trapz(a,dim) : computes the integral of iData objects elements along given dimension

   @iData/trapz function to compute the integral of the data set along a given dimension
     trapz(a,dim) integrates along axis of rank dim. The axis is then removed.
       default is to use dim=1. 
       If dim=0, integration is done on all axes and the total is returned as a
         scalar value. In this case, a second output argument holds the error bar.
       If dim='radial', the integration is done radially (R=sqrt(sum(axes^2)).
       trapz is complementary to sum and camproj, but takes into account axes.
     trapz(a,'radial', center) specifies the 'center' of the integration 
       (vector of coordinates) or a single value used as center on all axes 
       (for instance 0). All axes are assumed to be distances.

 input:  a: object or array (iData/array of)
         dim: dimension to integrate (int/array of, or 'radial')
 output: s: integral of elements (iData/scalar)
 ex:     c=trapz(a);

 Version: Mar. 22, 2017
 See also iData, iData/cumsum, iData/camproj, iData/sum

CROSS-REFERENCE INFORMATION ^

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