non-numeric argument to binary operator

[Sean Simpson]

I get this error when trying to plot: 

plot(SG, aes(fill=AGE, y=OC, x=AGE)) + 

  geom_blank() + theme_bw() +

  theme(panel.grid.major = element_blank(), panel.grid.minor = element_blank()) +

  geom_bar(position="dodge", stat="identity", colour="black", size=.3) + 

  geom_errorbar(aes(ymin=OC-SE, ymax=OC+SE), width=.1, size=.1, # Width of the error bars

                position=position_dodge(0)) +

      xlab("Crop Age") + ylab("SOC (%)") + ggtitle("") + expand_limits(y=c(NA, 4.5))

the error message is: Error in plot(SG, aes(fill = AC, y = OC, x = AC)) + geom_blank() : 

  non-numeric argument to binary operator

Any help is appreciated.

[Ista Zahn]

plot ==> ggplot

--Ista

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[Sean Simpson]

brilliant, thank you

[Sean Simpson]

A follow-up question now that you have resolved this issue. I am trying to draw multiple linear regressions on this plot. I have the equations that I want to draw but not sure how to do this. I have read a few other threads on here and still unsure where to start.

plot(SG, aes(fill=AGE, y=OC, x=AGE)) + 

  geom_blank() + theme_bw() +

  theme(panel.grid.major = element_blank(), panel.grid.minor = element_blank()) +

  geom_bar(position="dodge", stat="identity", colour="black", size=.3) + 

  geom_errorbar(aes(ymin=OC-SE, ymax=OC+SE), width=.1, size=.1, # Width of the error bars

                position=position_dodge(0)) +

      xlab("Crop Age") + ylab("SOC (%)") + ggtitle("") + expand_limits(y=c(NA, 4.5))

The two equations that I want to plot are: y=0.08x + 1.54 and y=0.03x + 2.79.

Any help is appreciated.

- Sean

On Monday, March 19, 2018 at 3:38:56 PM UTC-4, Ista Zahn wrote:

[tric...@uni-bremen.de]

Look at geom_abline with arguments for intercept and slope:
http://ggplot2.tidyverse.org/reference/geom_abline.html


Zitat von Sean Simpson <sean.s...@gmail.com>:

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