CU | R Documentation |

Compute Christiansen Coefficient of Uniformity (CU or UC). Coefficient is based upon the average deviation from the mean value and the mean value.

CU(x)

`x` |
numeric array of catch can data. Array may include missing (NA) data. NA values will be removed in function. |

*CU=100(1.0-∑ X/(nm))*

where *X=|z-m|*; absolute deviation of catch *z* from average catch *m* based on *n* observations (catches).

CU value in percentage. Note that CU can take on a negative value if the average deviation from the mean is greater than the mean.

Garry Grabow glgrabow@ncsu.edu

Christiansen, J. E. 1942. Irrigation by sprinkling. California Agricultural Experiment Station Bulletin 670. Berkeley, Cal.: University of California.

Keller, J., and R. D. Bliesner. 2000. Sprinkler and Trickle Irrigation. Caldwell, N.J.: Blackburn Press. ISBN 1-930665-19-9.

`DU`

,`DU.lh`

# data below are volumes caught in ml. Catch cans must be of # equal surface area at top when using volume data x<-c(47,42,45,24,13,26,33,34,27,30,40,44,32,12,12) xcu<-CU(x) #round results curnd<-round(xcu,2) xcu curnd

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.