haiii i want to know, is there any script in R to measure looping averageif (like in the excel) ....... for example: i have a vector row value 1 0 2 2 3 -3 4 -2 5 1 6 -2 i want to measure the average of the vector for negative value with window estimation 5 so first mean is (-3+-2)/2 second mean is (-3+-2+-2)/3