# Knowledge Base

 Navigation: Scripting Language > Near to far field projections farfield2dintegrate

Calculates the integral of the far field projection over some range of theta in 2D simulation. Angles are specified in degrees, but the integral is done in radians.

 Supported Product: FDTD, MODE

 Syntax Description out = farfield2dintegrate(E2, theta, halfangle, theta0); Integrate 2D far field projection data.

 Parameter Default value Type Description E2 required matrix E field data from farfield2d theta required matrix Theta from farfieldangle halfangle optional 90 vector Half angle (in degrees) of the integration region. Must have same length as theta0 or length 1. Half angle should be between 0 to 90 degrees. theta0 optional 0 vector Center angle (in degrees) theta of the integration region. Must have same length as halfangle or length 1. Theta0 should be between -90 to 90 degrees.

Example

Calculate the fraction of power in the far field from 20 to 70 degrees.

m="monitor1";

E2=farfield2d(m);

theta=farfieldangle(m);

?farfield2dintegrate(E2,theta,25,45) / farfield2dintegrate(E2,theta);