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cesCalcN4 <- function( xNames, tName, data, coef ) {
gammaStar <- coef[ "gamma" ]
if( "lambda" %in% names( coef ) ) {
gammaStar <- gammaStar * exp( coef[ "lambda" ] * data[[ tName ]] )
}
B1 <- cesDerivCoefN4B1( coef = coef, data = data, xNames = xNames )
B2 <- cesDerivCoefN4B2( coef = coef, data = data, xNames = xNames )
if( coef[ "rho" ] == 0 ) {
if( coef[ "rho_1" ] == 0 ) {
if( coef[ "rho_2" ] == 0 ) {
result <- gammaStar *
exp( - coef[ "nu" ] *
( coef[ "delta" ] *
( - coef[ "delta_1" ] * log( data[[ xNames[ 1 ] ]] ) -
( 1 - coef[ "delta_1" ] ) * log( data[[ xNames[ 2 ] ]] ) ) +
( 1 - coef[ "delta" ] ) *
( - coef[ "delta_2" ] * log( data[[ xNames[ 3 ] ]] ) -
( 1 - coef[ "delta_2" ] ) * log( data[[ xNames[ 4 ] ]] ) ) ) )
} else {
result <- gammaStar *
exp( - coef[ "nu" ] *
( coef[ "delta" ] *
( - coef[ "delta_1" ] * log( data[[ xNames[ 1 ] ]] ) -
( 1 - coef[ "delta_1" ] ) * log( data[[ xNames[ 2 ] ]] ) ) +
( 1 - coef[ "delta" ] ) * log( B2 ) / coef[ "rho_2" ] ) )
}
} else if( coef[ "rho_2" ] == 0 ) {
result <- gammaStar *
exp( - coef[ "nu" ] *
( coef[ "delta" ] * log( B1 ) / coef[ "rho_1" ] +
( 1 - coef[ "delta" ] ) *
( - coef[ "delta_2" ] * log( data[[ xNames[ 3 ] ]] ) -
( 1 - coef[ "delta_2" ] ) * log( data[[ xNames[ 4 ] ]] ) ) ) )
} else {
result <- gammaStar *
exp( - coef[ "nu" ] *
( coef[ "delta" ] * log( B1 ) / coef[ "rho_1" ] +
( 1 - coef[ "delta" ] ) * log( B2 ) / coef[ "rho_2" ] ) )
}
} else if( coef[ "rho_1" ] == 0 ) {
if( coef[ "rho_2" ] == 0 ) {
result <- gammaStar *
( coef[ "delta" ] *
exp( coef[ "rho" ] *
( - coef[ "delta_1" ] * log( data[[ xNames[ 1 ] ]] ) -
( 1 - coef[ "delta_1" ] ) * log( data[[ xNames[ 2 ] ]] ) ) ) +
( 1 - coef[ "delta" ] ) *
exp( coef[ "rho" ] *
( - coef[ "delta_2" ] * log( data[[ xNames[ 3 ] ]] ) -
( 1 - coef[ "delta_2" ] ) * log( data[[ xNames[ 4 ] ]] ) ) )
)^( - ( coef[ "nu" ] / coef[ "rho" ] ) )
} else {
result <- gammaStar *
( coef[ "delta" ] *
exp( coef[ "rho" ] *
( - coef[ "delta_1" ] * log( data[[ xNames[ 1 ] ]] ) -
( 1 - coef[ "delta_1" ] ) * log( data[[ xNames[ 2 ] ]] ) ) ) +
( 1 - coef[ "delta" ] ) *
B2^( coef[ "rho" ] / coef[ "rho_2" ] )
)^( - ( coef[ "nu" ] / coef[ "rho" ] ) )
}
} else if( coef[ "rho_2" ] == 0 ) {
result <- gammaStar *
( coef[ "delta" ] * B1^( coef[ "rho" ] / coef[ "rho_1" ] ) +
( 1 - coef[ "delta" ] ) *
exp( coef[ "rho" ] *
( - coef[ "delta_2" ] * log( data[[ xNames[ 3 ] ]] ) -
( 1 - coef[ "delta_2" ] ) * log( data[[ xNames[ 4 ] ]] ) ) )
)^( - ( coef[ "nu" ] / coef[ "rho" ] ) )
} else {
result <- gammaStar * ( coef[ "delta" ] *
( coef[ "delta_1" ] * data[[ xNames[ 1 ] ]]^( -coef[ "rho_1" ] ) +
( 1 - coef[ "delta_1" ] ) * data[[ xNames[ 2 ] ]]^( -coef[ "rho_1" ] )
)^( coef[ "rho" ] / coef[ "rho_1" ] ) +
( 1 - coef[ "delta" ] ) *
( coef[ "delta_2" ] * data[[ xNames[ 3 ] ]]^( -coef[ "rho_2" ] ) +
( 1 - coef[ "delta_2" ] ) * data[[ xNames[ 4 ] ]]^( -coef[ "rho_2" ] )
)^( coef[ "rho" ] / coef[ "rho_2" ] )
)^( - coef[ "nu" ] / coef[ "rho" ] )
}
return( result )
}
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