| u_gr {XRSCC} | R Documentation |
The u chart control for attributes
Description
Calculates the u control chart for attributes, given a variable sample n and a number of nonconformities u per sample. The plotted values in graph are the average number of nonconformities per unit.
Usage
u_gr(U)
Arguments
U |
A data frame containing the number d of nonconformities per sample, the sample n can be variable. Note that the variable names must be lowercase letter, say d and n. |
Value
in.control |
The under control row list for the u chart |
out.control |
The out of control row list for the u chart |
Iteraciones |
The number of iterations, in this function always will be the first and the last one |
data.0 |
The original data frame |
data.1 |
Subsetting the data frame with under control rows |
bin |
The binary values for out of control equal to one and under control equal to zero |
Limites de Control Grafica \emph{u} |
The u chart control limits vector |
Conclusion del proceso |
The same results in a phrase as the bin values |
Author(s)
Erick Marroquin
References
Montgomery, D.C. (2005) Introduction to Statistical Quality Control, 5th ed. New York: John Wiley & Sons, ISBN 0-471-65631-3
See Also
p_gr, np_gr, c_gr, P_it, NP_it, C_it, U_it
Examples
data(udata2)
u_gr(udata2)