Howdy, R Grues I have enjoyed R, but I cannot solve one problem easily. Please help my problem. When I tried the R script, I got the following Error. This error results from input data file exported through a Excel spreadsheet software.
Error in step(lm(pop.rate ~ as.numeric(year) + as.factor(policy) + as.numeric(nation.grant) + : number of rows in use has changed: remove missing values? Could you direct me to solve the Error? Thanks in advance, > ############### outputs from R console ############### > pop <- step( + lm(pop.rate ~ as.numeric(year) + as.factor(policy) + as.numeric(nation.grant) + + as.numeric(do.grant) + as.numeric(city.grant) + as.numeric(DMZ.dist) + as.numeric(Seoul.dist), data=borderI.data, na.action = na.omit) + ) Start: AIC=494.27 pop.rate ~ as.numeric(year) + as.factor(policy) + as.numeric(nation.grant) + as.numeric(do.grant) + as.numeric(city.grant) + as.numeric(DMZ.dist) + as.numeric(Seoul.dist) Df Sum of Sq RSS AIC - as.numeric(do.grant) 1 0.71 6622.9 492.28 - as.factor(policy) 1 1.21 6623.4 492.29 - as.numeric(DMZ.dist) 1 1.91 6624.1 492.30 - as.numeric(city.grant) 1 5.07 6627.3 492.36 - as.numeric(nation.grant) 1 11.51 6633.7 492.47 - as.numeric(year) 1 29.58 6651.8 492.80 <none> 6622.2 494.27 - as.numeric(Seoul.dist) 1 673.22 7295.4 503.79 Step: AIC=492.28 pop.rate ~ as.numeric(year) + as.factor(policy) + as.numeric(nation.grant) + as.numeric(city.grant) + as.numeric(DMZ.dist) + as.numeric(Seoul.dist) Df Sum of Sq RSS AIC - as.factor(policy) 1 1.99 6624.9 490.32 - as.numeric(DMZ.dist) 1 2.09 6625.0 490.32 - as.numeric(city.grant) 1 7.18 6630.1 490.41 - as.numeric(nation.grant) 1 20.08 6643.0 490.64 - as.numeric(year) 1 28.89 6651.8 490.80 <none> 6622.9 492.28 - as.numeric(Seoul.dist) 1 697.46 7320.4 502.20 Step: AIC=490.32 pop.rate ~ as.numeric(year) + as.numeric(nation.grant) + as.numeric(city.grant) + as.numeric(DMZ.dist) + as.numeric(Seoul.dist) Df Sum of Sq RSS AIC - as.numeric(DMZ.dist) 1 2.08 6627.0 488.35 - as.numeric(city.grant) 1 10.65 6635.6 488.51 - as.numeric(nation.grant) 1 31.30 6656.2 488.88 - as.numeric(year) 1 31.44 6656.4 488.88 <none> 6624.9 490.32 - as.numeric(Seoul.dist) 1 732.88 7357.8 500.80 Step: AIC=488.35 pop.rate ~ as.numeric(year) + as.numeric(nation.grant) + as.numeric(city.grant) + as.numeric(Seoul.dist) Df Sum of Sq RSS AIC - as.numeric(city.grant) 1 9.86 6636.9 486.53 - as.numeric(year) 1 31.42 6658.4 486.92 - as.numeric(nation.grant) 1 33.33 6660.3 486.95 <none> 6627.0 488.35 - as.numeric(Seoul.dist) 1 754.40 7381.4 499.18 Error in step(lm(pop.rate ~ as.numeric(year) + as.factor(policy) + as.numeric(nation.grant) + : ------------------------------------------------------------------------------------------------------------------------------------------- number of rows in use has changed: remove missing values? ------------------------------------------------------------------------------------------ -- Kum-Hoe Hwang, Ph.D. Phone : 82-31-250-3516 Email : phdhw...@gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.