Programmer Guide/Command Reference/EVAL/yint

yint

Calculates the integration r of the vector y with nrow(y)+1 elements.

Usage:

yint(y,dx,c)

Parameters:

y

The y data vector.

dx

The x increment. If dx is not specified, the default value of 1 is used.

c

The start value (default = 0).

Result:

r[0] = c, r[i+1] = r[i] + y[i]*dx

with: i = 0 .. nrow(y)-1

Usage:

yint(y,x,c)

Parameters:

y

The y data vector.

x

The x data vector with nrow(y)+1 elements.

c

The start value (default = 0).

Result:

r[0] = c, r[i+1] = r[i] + y[i]*(x[i+1]-x[i])

with: i = 0 .. nrow(y)-1